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class="menu navigation"><div class="list-h"><a target="_blank" rel="external nofollow noopener noreferrer" href="https://github.com/MHuiG" active-action="action-https:githubcomMHuiG"><i class="fa-brands fa-github color-github fa-fw"></i><p>Github</p></a><a href="/pages/friends/" active-action="action-pagesfriends"><i class="fa-duotone fa-link color-friends fa-fw"></i><p>友链</p></a><a href="/pages/about/" active-action="action-pagesabout"><i class="fa-duotone fa-user-tie color-about fa-fw"></i><p>关于</p></a><a href="https://www.travellings.cn/go-by-clouds.html" target="_blank" active-action="action-https:wwwtravellingscngo-by-cloudshtml" rel="external nofollow noopener noreferrer"><i class="fa-duotone fa-subway color-travellings fa-fw"></i><p>Travelling</p></a></div></div></div></div><div id="scroll-down" style="display:none"><i class="fa fa-chevron-down scroll-down-effects"></i></div></div></div><div id="safearea"><div class="body-wrapper"><div id="l_main" class><article itemscope itemtype="http://schema.org/Article" class="article post white-box reveal md shadow floatable blur article-type-post" id="post" itemprop="blogPost"><link itemprop="mainEntityOfPage" href="https://blog.mhuig.top/p/2b995a0c/"><span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"><meta itemprop="name" content="MHuiG"></span><span hidden itemprop="post" itemscope itemtype="http://schema.org/Post"><meta itemprop="name" content="MHuiG"><meta itemprop="description" content="MHuiG&#39;s Blog (MHuiG的博客) MHuiG&#39;s Neverland（MHuiG的梦幻岛） —— MHuiG(@MHuiG) 随便写写画画的地方 - 技术博客"></span><span hidden><meta itemprop="image" content="/lib/favicon/android-chrome-192x192.png"></span><div class="article-meta" id="top"><h1 class="title" itemprop="name headline"> 离散世界与连续世界的联系</h1><div class="new-meta-box"><div class="new-meta-item author" itemprop="author" itemscope itemtype="http://schema.org/Person"> <a itemprop="url" class="author" target="_blank" href="https://mhuig.top/" rel="nofollow noopener"><img itemprop="image" src="/lib/avatar/avatar-16.webp?v=2199236952" class="lazyload" data-srcset="/lib/avatar/avatar-16.webp" srcset="data:image/gif;base64,R0lGODlhAQABAIAAAP///////yH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><p itemprop="name">MHuiG</p></a></div><div class="new-meta-item wordcount"><a class="notlink"><i class="fa-duotone fa-keyboard fa-fw" aria-hidden="true"></i><p>字数：183 字</p></a></div><div class="new-meta-item readtime"><a class="notlink"><i class="fa-duotone fa-hourglass-half fa-fw" aria-hidden="true"></i><p>时长：1 分钟</p></a></div></div></div><div id="layoutHelper-page-plugins"></div><div id="post-body" itemprop="articleBody"><div class="story post-story"><h2 id="探索"><a href="#探索" class="headerlink" title="探索"></a>探索</h2><p>当年，哥德巴赫异想天开就想离散的世界的阶乘<mjx-container class="MathJax" jax="SVG"><svg style="vertical-align:-.025ex" xmlns="http://www.w3.org/2000/svg" width="1.986ex" height="1.645ex" role="img" focusable="false" viewBox="0 -716 878 727"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="1D45B" d="M21 287Q22 293 24 303T36 341 56 388 89 425 135 442Q171 442 195 424T225 390 231 369Q231 367 232 367L243 378Q304 442 382 442 436 442 469 415T503 336 465 179 427 52Q427 26 444 26 450 26 453 27 482 32 505 65T540 145Q542 153 560 153 580 153 580 145 580 144 576 130 568 101 554 73T508 17 439-10Q392-10 371 17T350 73Q350 92 386 193T423 345Q423 404 379 404H374Q288 404 229 303L222 291 189 157Q156 26 151 16 138-11 108-11 95-11 87-5T76 7 74 17Q74 30 112 180T152 343Q153 348 153 366 153 405 129 405 91 405 66 305 60 285 60 284 58 278 41 278H27Q21 284 21 287Z"/></g><g data-mml-node="mo" transform="translate(600,0)"><path data-c="21" d="M78 661Q78 682 96 699T138 716 180 700 199 661Q199 654 179 432T158 206Q156 198 139 198 121 198 119 206 118 209 98 431T78 661ZM79 61Q79 89 97 105T141 121Q164 119 181 104T198 61Q198 31 181 16T139 1Q114 1 97 16T79 61Z"/></g></g></g></svg></mjx-container>能不能用连续世界的积分<mjx-container class="MathJax" jax="SVG"><svg style="vertical-align:-.691ex" xmlns="http://www.w3.org/2000/svg" width="1.38ex" height="2.514ex" role="img" focusable="false" viewBox="0 -805.5 610 1111"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mo" transform="translate(0 0.5)"><path data-c="222B" d="M113-244Q113-246 119-251T139-263 167-269Q186-269 199-260 220-247 232-218T251-133 262-15 276 155 297 367Q300 390 305 438T314 512 325 580 340 647 361 703 390 751 428 784 479 804Q481 804 488 804T501 805Q552 802 581 769T610 695Q610 669 594 657T561 645Q542 645 527 658T512 694Q512 705 516 714T526 729 538 737 548 742L552 743Q552 745 545 751T525 762 498 768Q475 768 460 756T434 716 418 652 407 559 398 444 387 300 369 133Q349-38 337-102T303-207Q256-306 169-306 119-306 87-272T55-196Q55-170 71-158T104-146Q123-146 138-159T153-195Q153-206 149-215T139-230 127-238 117-242L113-244Z"/></g></g></g></svg></mjx-container>来表达。</p><p><mjx-container class="MathJax" jax="SVG" display="true" width="full" style="min-width:17.61ex"><svg style="vertical-align:-1.948ex;min-width:17.61ex" xmlns="http://www.w3.org/2000/svg" width="100%" height="5.027ex" role="img" focusable="false"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(0.0181,-0.0181) translate(0, -1361)"><g data-mml-node="math"><g data-mml-node="mtable" transform="translate(2078,0) translate(-2078,0)"><g transform="translate(0 1361) matrix(1 0 0 -1 0 0) scale(55.25)"><svg data-table="true" preserveAspectRatio="xMidYMid" viewBox="1813.8 -1361 1 2222"><g transform="matrix(1 0 0 -1 0 0)"><g data-mml-node="mlabeledtr"><g data-mml-node="mtd"><g data-mml-node="mi"><path data-c="1D45B" d="M21 287Q22 293 24 303T36 341 56 388 89 425 135 442Q171 442 195 424T225 390 231 369Q231 367 232 367L243 378Q304 442 382 442 436 442 469 415T503 336 465 179 427 52Q427 26 444 26 450 26 453 27 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119T261 12 224-76 186-143 145-194 113-227 90-246Q87-249 86-250H74Q66-250 63-250T58-247 55-238Q56-237 66-225 221-64 221 250T66 725Q56 737 55 738 55 746 60 749Z" transform="translate(889,0)"/></g></g></g></svg></g></g></g></g></svg></mjx-container></p><p>哥德巴赫有个好朋友叫伯努利，伯努利有个学生叫欧拉。<psw>欧拉有个学生叫拉格朗日，拉格朗日有个学生叫柯西</psw></p><p>哥德巴赫与伯努利交流，问伯努利：有没有离散世界和连续世界可以相等的呢？</p><p>伯努利想不明白，就问他的学生欧拉，然后欧拉一晚上想出来了。<psw>故事结束</psw></p></div><div class="story post-story"><h2 id="伽玛函数"><a href="#伽玛函数" class="headerlink" title="伽玛函数"></a>伽玛函数</h2><p><mjx-container class="MathJax" jax="SVG" display="true" width="full" style="min-width:46.179ex"><svg style="vertical-align:-2.163ex;min-width:46.179ex" xmlns="http://www.w3.org/2000/svg" width="100%" height="5.457ex" role="img" focusable="false"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(0.0181,-0.0181) translate(0, -1456.1)"><g data-mml-node="math"><g data-mml-node="mtable" transform="translate(2078,0) translate(-2078,0)"><g transform="translate(0 1456.1) matrix(1 0 0 -1 0 0) scale(55.25)"><svg data-table="true" preserveAspectRatio="xMidYMid" viewBox="8127.6 -1456.1 1 2412.2"><g transform="matrix(1 0 0 -1 0 0)"><g data-mml-node="mlabeledtr" transform="translate(0,-44.2)"><g data-mml-node="mtd"><g data-mml-node="mi"><path data-c="393" d="M128 619Q121 626 117 628T101 631 58 634H25V680H554V676Q556 670 568 560T582 444V440H542V444Q542 445 538 478T523 545 492 598Q454 634 349 634H334Q264 634 249 633T233 621Q232 618 232 339L233 61Q240 54 245 52T270 48 333 46H360V0H348Q324 3 182 3 51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z"/></g><g data-mml-node="mo" transform="translate(625,0)"><path data-c="28" d="M94 250Q94 319 104 381T127 488 164 576 202 643 244 695 277 729 302 750H315 319Q333 750 333 741 333 738 316 720T275 667 226 581 184 443 167 250 184 58 225-81 274-167 316-220 333-241Q333-250 318-250H315 302L274-226Q180-141 137-14T94 250Z"/></g><g data-mml-node="mi" transform="translate(1014,0)"><path data-c="1D6FC" 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616Q424 629 417 632T378 637H357Q351 643 351 645T353 664Q358 683 366 683ZM352 326Q329 405 277 405 242 405 210 374T160 293Q131 214 119 129 119 126 119 118T118 106Q118 61 136 44T179 26Q233 26 290 98L298 109 352 326Z"/></g><g data-mml-node="mi" transform="translate(8071.1,0)"><path data-c="1D465" d="M52 289Q59 331 106 386T222 442Q257 442 286 424T329 379Q371 442 430 442 467 442 494 420T522 361Q522 332 508 314T481 292 458 288Q439 288 427 299T415 328Q415 374 465 391 454 404 425 404 412 404 406 402 368 386 350 336 290 115 290 78 290 50 306 38T341 26Q378 26 414 59T463 140Q466 150 469 151T485 153H489Q504 153 504 145 504 144 502 134 486 77 440 33T333-11Q263-11 227 52 186-10 133-10H127Q78-10 57 16T35 71Q35 103 54 123T99 143Q142 143 142 101 142 81 130 66T107 46 94 41L91 40Q91 39 97 36T113 29 132 26Q168 26 194 71 203 87 217 139T245 247 261 313Q266 340 266 352 266 380 251 392T217 404Q177 404 142 372T93 290Q91 281 88 280T72 278H58Q52 284 52 289Z"/></g></g></g></svg></mjx-container></p><p><mjx-container class="MathJax" jax="SVG"><svg style="vertical-align:-.566ex" xmlns="http://www.w3.org/2000/svg" width="8.459ex" height="2.262ex" role="img" focusable="false" viewBox="0 -750 3738.8 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mo"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347 722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153 722 140 707 133H70Q56 140 56 153Z"/></g><g data-mml-node="mi" transform="translate(1055.8,0)"><path data-c="1D6FC" d="M34 156Q34 270 120 356T309 442Q379 442 421 402T478 304Q484 275 485 237V208Q534 282 560 374 564 388 566 390T582 393Q603 393 603 385 603 376 594 346T558 261 497 161L486 147 487 123Q489 67 495 47T514 26Q528 28 540 37T557 60Q559 67 562 68T577 70Q597 70 597 62 597 56 591 43 579 19 556 5T512-10H505Q438-10 414 62L411 69 400 61Q390 53 370 41T325 18 267-2 203-11Q124-11 79 39T34 156ZM208 26Q257 26 306 47T379 90L403 112Q401 255 396 290 382 405 304 405 235 405 183 332 156 292 139 224T121 120Q121 71 146 49T208 26Z"/></g><g data-mml-node="mi" transform="translate(1695.8,0)"><path data-c="393" d="M128 619Q121 626 117 628T101 631 58 634H25V680H554V676Q556 670 568 560T582 444V440H542V444Q542 445 538 478T523 545 492 598Q454 634 349 634H334Q264 634 249 633T233 621Q232 618 232 339L233 61Q240 54 245 52T270 48 333 46H360V0H348Q324 3 182 3 51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z"/></g><g data-mml-node="mo" transform="translate(2320.8,0)"><path data-c="28" d="M94 250Q94 319 104 381T127 488 164 576 202 643 244 695 277 729 302 750H315 319Q333 750 333 741 333 738 316 720T275 667 226 581 184 443 167 250 184 58 225-81 274-167 316-220 333-241Q333-250 318-250H315 302L274-226Q180-141 137-14T94 250Z"/></g><g data-mml-node="mi" transform="translate(2709.8,0)"><path data-c="1D6FC" d="M34 156Q34 270 120 356T309 442Q379 442 421 402T478 304Q484 275 485 237V208Q534 282 560 374 564 388 566 390T582 393Q603 393 603 385 603 376 594 346T558 261 497 161L486 147 487 123Q489 67 495 47T514 26Q528 28 540 37T557 60Q559 67 562 68T577 70Q597 70 597 62 597 56 591 43 579 19 556 5T512-10H505Q438-10 414 62L411 69 400 61Q390 53 370 41T325 18 267-2 203-11Q124-11 79 39T34 156ZM208 26Q257 26 306 47T379 90L403 112Q401 255 396 290 382 405 304 405 235 405 183 332 156 292 139 224T121 120Q121 71 146 49T208 26Z"/></g><g data-mml-node="mo" transform="translate(3349.8,0)"><path data-c="29" d="M60 749 64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12 224-76 186-143 145-194 113-227 90-246Q87-249 86-250H74Q66-250 63-250T58-247 55-238Q56-237 66-225 221-64 221 250T66 725Q56 737 55 738 55 746 60 749Z"/></g></g></g></svg></mjx-container></p><p>得到：</p><p><mjx-container class="MathJax" jax="SVG" display="true" width="full" style="min-width:27.009ex"><svg style="vertical-align:-.566ex;min-width:27.009ex" xmlns="http://www.w3.org/2000/svg" width="100%" height="2.262ex" role="img" focusable="false"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(0.0181,-0.0181) translate(0, -750)"><g data-mml-node="math"><g data-mml-node="mtable" transform="translate(2078,0) translate(-2078,0)"><g transform="translate(0 750) matrix(1 0 0 -1 0 0) scale(55.25)"><svg data-table="true" preserveAspectRatio="xMidYMid" viewBox="3891 -750 1 1000"><g transform="matrix(1 0 0 -1 0 0)"><g data-mml-node="mlabeledtr"><g data-mml-node="mtd"><g data-mml-node="mi"><path data-c="393" d="M128 619Q121 626 117 628T101 631 58 634H25V680H554V676Q556 670 568 560T582 444V440H542V444Q542 445 538 478T523 545 492 598Q454 634 349 634H334Q264 634 249 633T233 621Q232 618 232 339L233 61Q240 54 245 52T270 48 333 46H360V0H348Q324 3 182 3 51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z"/></g><g data-mml-node="mo" transform="translate(625,0)"><path data-c="28" d="M94 250Q94 319 104 381T127 488 164 576 202 643 244 695 277 729 302 750H315 319Q333 750 333 741 333 738 316 720T275 667 226 581 184 443 167 250 184 58 225-81 274-167 316-220 333-241Q333-250 318-250H315 302L274-226Q180-141 137-14T94 250Z"/></g><g data-mml-node="mi" transform="translate(1014,0)"><path data-c="1D6FC" d="M34 156Q34 270 120 356T309 442Q379 442 421 402T478 304Q484 275 485 237V208Q534 282 560 374 564 388 566 390T582 393Q603 393 603 385 603 376 594 346T558 261 497 161L486 147 487 123Q489 67 495 47T514 26Q528 28 540 37T557 60Q559 67 562 68T577 70Q597 70 597 62 597 56 591 43 579 19 556 5T512-10H505Q438-10 414 62L411 69 400 61Q390 53 370 41T325 18 267-2 203-11Q124-11 79 39T34 156ZM208 26Q257 26 306 47T379 90L403 112Q401 255 396 290 382 405 304 405 235 405 183 332 156 292 139 224T121 120Q121 71 146 49T208 26Z"/></g><g data-mml-node="mo" transform="translate(1876.2,0)"><path data-c="2B" d="M56 237T56 250 70 270H369V420L370 570Q380 583 389 583 402 583 409 568V270H707Q722 262 722 250T707 230H409V-68Q401-82 391-82H389 387Q375-82 369-68V230H70Q56 237 56 250Z"/></g><g data-mml-node="mn" transform="translate(2876.4,0)"><path data-c="31" d="M213 578 200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641 273 663Q275 666 285 666 294 666 302 660V361L303 61Q310 54 315 52T339 48 401 46H427V0H416Q395 3 257 3 121 3 100 0H88V46H114Q136 46 152 46T177 47 193 50 201 52 207 57 213 61V578Z"/></g><g data-mml-node="mo" transform="translate(3376.4,0)"><path data-c="29" d="M60 749 64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12 224-76 186-143 145-194 113-227 90-246Q87-249 86-250H74Q66-250 63-250T58-247 55-238Q56-237 66-225 221-64 221 250T66 725Q56 737 55 738 55 746 60 749Z"/></g><g data-mml-node="mo" transform="translate(4043.2,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347 722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153 722 140 707 133H70Q56 140 56 153Z"/></g><g data-mml-node="mi" transform="translate(5099,0)"><path data-c="1D6FC" d="M34 156Q34 270 120 356T309 442Q379 442 421 402T478 304Q484 275 485 237V208Q534 282 560 374 564 388 566 390T582 393Q603 393 603 385 603 376 594 346T558 261 497 161L486 147 487 123Q489 67 495 47T514 26Q528 28 540 37T557 60Q559 67 562 68T577 70Q597 70 597 62 597 56 591 43 579 19 556 5T512-10H505Q438-10 414 62L411 69 400 61Q390 53 370 41T325 18 267-2 203-11Q124-11 79 39T34 156ZM208 26Q257 26 306 47T379 90L403 112Q401 255 396 290 382 405 304 405 235 405 183 332 156 292 139 224T121 120Q121 71 146 49T208 26Z"/></g><g data-mml-node="mi" transform="translate(5739,0)"><path data-c="393" d="M128 619Q121 626 117 628T101 631 58 634H25V680H554V676Q556 670 568 560T582 444V440H542V444Q542 445 538 478T523 545 492 598Q454 634 349 634H334Q264 634 249 633T233 621Q232 618 232 339L233 61Q240 54 245 52T270 48 333 46H360V0H348Q324 3 182 3 51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z"/></g><g data-mml-node="mo" transform="translate(6364,0)"><path data-c="28" d="M94 250Q94 319 104 381T127 488 164 576 202 643 244 695 277 729 302 750H315 319Q333 750 333 741 333 738 316 720T275 667 226 581 184 443 167 250 184 58 225-81 274-167 316-220 333-241Q333-250 318-250H315 302L274-226Q180-141 137-14T94 250Z"/></g><g data-mml-node="mi" transform="translate(6753,0)"><path data-c="1D6FC" d="M34 156Q34 270 120 356T309 442Q379 442 421 402T478 304Q484 275 485 237V208Q534 282 560 374 564 388 566 390T582 393Q603 393 603 385 603 376 594 346T558 261 497 161L486 147 487 123Q489 67 495 47T514 26Q528 28 540 37T557 60Q559 67 562 68T577 70Q597 70 597 62 597 56 591 43 579 19 556 5T512-10H505Q438-10 414 62L411 69 400 61Q390 53 370 41T325 18 267-2 203-11Q124-11 79 39T34 156ZM208 26Q257 26 306 47T379 90L403 112Q401 255 396 290 382 405 304 405 235 405 183 332 156 292 139 224T121 120Q121 71 146 49T208 26Z"/></g><g data-mml-node="mo" transform="translate(7393,0)"><path data-c="29" d="M60 749 64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12 224-76 186-143 145-194 113-227 90-246Q87-249 86-250H74Q66-250 63-250T58-247 55-238Q56-237 66-225 221-64 221 250T66 725Q56 737 55 738 55 746 60 749Z"/></g></g></g></g></svg><svg data-labels="true" preserveAspectRatio="xMaxYMid" viewBox="1278 -750 1 1000"><g data-labels="true" transform="matrix(1 0 0 -1 0 0)"><g data-mml-node="mtd" id="mjx-eqn:4"><g data-mml-node="mtext"><path data-c="28" d="M94 250Q94 319 104 381T127 488 164 576 202 643 244 695 277 729 302 750H315 319Q333 750 333 741 333 738 316 720T275 667 226 581 184 443 167 250 184 58 225-81 274-167 316-220 333-241Q333-250 318-250H315 302L274-226Q180-141 137-14T94 250Z"/><path data-c="34" d="M462 0Q444 3 333 3 217 3 199 0H190V46H221Q241 46 248 46T265 48 279 53 286 61Q287 63 287 115V165H28V211L179 442Q332 674 334 675 336 677 355 677H373L379 671V211H471V165H379V114Q379 73 379 66T385 54Q393 47 442 46H471V0H462ZM293 211V545L74 212 183 211H293Z" transform="translate(389,0)"/><path data-c="29" d="M60 749 64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12 224-76 186-143 145-194 113-227 90-246Q87-249 86-250H74Q66-250 63-250T58-247 55-238Q56-237 66-225 221-64 221 250T66 725Q56 737 55 738 55 746 60 749Z" transform="translate(889,0)"/></g></g></g></svg></g></g></g></g></svg></mjx-container></p><p>当<mjx-container class="MathJax" jax="SVG"><svg style="vertical-align:-.186ex" xmlns="http://www.w3.org/2000/svg" width="5.596ex" height="1.692ex" role="img" focusable="false" viewBox="0 -666 2473.6 748"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="1D6FC" d="M34 156Q34 270 120 356T309 442Q379 442 421 402T478 304Q484 275 485 237V208Q534 282 560 374 564 388 566 390T582 393Q603 393 603 385 603 376 594 346T558 261 497 161L486 147 487 123Q489 67 495 47T514 26Q528 28 540 37T557 60Q559 67 562 68T577 70Q597 70 597 62 597 56 591 43 579 19 556 5T512-10H505Q438-10 414 62L411 69 400 61Q390 53 370 41T325 18 267-2 203-11Q124-11 79 39T34 156ZM208 26Q257 26 306 47T379 90L403 112Q401 255 396 290 382 405 304 405 235 405 183 332 156 292 139 224T121 120Q121 71 146 49T208 26Z"/></g><g data-mml-node="mo" transform="translate(917.8,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347 722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153 722 140 707 133H70Q56 140 56 153Z"/></g><g data-mml-node="mn" transform="translate(1973.6,0)"><path data-c="31" d="M213 578 200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641 273 663Q275 666 285 666 294 666 302 660V361L303 61Q310 54 315 52T339 48 401 46H427V0H416Q395 3 257 3 121 3 100 0H88V46H114Q136 46 152 46T177 47 193 50 201 52 207 57 213 61V578Z"/></g></g></g></svg></mjx-container>时，<mjx-container class="MathJax" jax="SVG"><svg style="vertical-align:-.806ex" xmlns="http://www.w3.org/2000/svg" width="22.261ex" height="2.944ex" role="img" focusable="false" viewBox="0 -944.8 9839.5 1301.2"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="393" d="M128 619Q121 626 117 628T101 631 58 634H25V680H554V676Q556 670 568 560T582 444V440H542V444Q542 445 538 478T523 545 492 598Q454 634 349 634H334Q264 634 249 633T233 621Q232 618 232 339L233 61Q240 54 245 52T270 48 333 46H360V0H348Q324 3 182 3 51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z"/></g><g data-mml-node="mo" transform="translate(625,0)"><path data-c="28" d="M94 250Q94 319 104 381T127 488 164 576 202 643 244 695 277 729 302 750H315 319Q333 750 333 741 333 738 316 720T275 667 226 581 184 443 167 250 184 58 225-81 274-167 316-220 333-241Q333-250 318-250H315 302L274-226Q180-141 137-14T94 250Z"/></g><g data-mml-node="mn" transform="translate(1014,0)"><path data-c="31" d="M213 578 200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641 273 663Q275 666 285 666 294 666 302 660V361L303 61Q310 54 315 52T339 48 401 46H427V0H416Q395 3 257 3 121 3 100 0H88V46H114Q136 46 152 46T177 47 193 50 201 52 207 57 213 61V578Z"/></g><g data-mml-node="mo" transform="translate(1514,0)"><path data-c="29" d="M60 749 64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12 224-76 186-143 145-194 113-227 90-246Q87-249 86-250H74Q66-250 63-250T58-247 55-238Q56-237 66-225 221-64 221 250T66 725Q56 737 55 738 55 746 60 749Z"/></g><g data-mml-node="mo" transform="translate(2180.8,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347 722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153 722 140 707 133H70Q56 140 56 153Z"/></g><g data-mml-node="msubsup" transform="translate(3236.6,0)"><g data-mml-node="mo" transform="translate(0 0.5)"><path data-c="222B" d="M113-244Q113-246 119-251T139-263 167-269Q186-269 199-260 220-247 232-218T251-133 262-15 276 155 297 367Q300 390 305 438T314 512 325 580 340 647 361 703 390 751 428 784 479 804Q481 804 488 804T501 805Q552 802 581 769T610 695Q610 669 594 657T561 645Q542 645 527 658T512 694Q512 705 516 714T526 729 538 737 548 742L552 743Q552 745 545 751T525 762 498 768Q475 768 460 756T434 716 418 652 407 559 398 444 387 300 369 133Q349-38 337-102T303-207Q256-306 169-306 119-306 87-272T55-196Q55-170 71-158T104-146Q123-146 138-159T153-195Q153-206 149-215T139-230 127-238 117-242L113-244Z"/></g><g data-mml-node="TeXAtom" transform="translate(699.9,532.6) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mo"><path data-c="2B" d="M56 237T56 250 70 270H369V420L370 570Q380 583 389 583 402 583 409 568V270H707Q722 262 722 250T707 230H409V-68Q401-82 391-82H389 387Q375-82 369-68V230H70Q56 237 56 250Z"/></g><g data-mml-node="mi" transform="translate(778,0)"><path data-c="221E" d="M55 217Q55 305 111 373T254 442Q342 442 419 381 457 350 493 303L507 284 514 294Q618 442 747 442 833 442 888 374T944 214Q944 128 889 59T743-11Q657-11 580 50 542 81 506 128L492 147 485 137Q381-11 252-11 166-11 111 57T55 217ZM907 217Q907 285 869 341T761 397Q740 397 720 392T682 378 648 359 619 335 594 310 574 285 559 263 548 246L543 238 574 198Q605 158 622 138T664 94 714 61 765 51Q827 51 867 100T907 217ZM92 214Q92 145 131 89T239 33Q357 33 456 193L425 233Q364 312 334 337 285 380 233 380 171 380 132 331T92 214Z"/></g></g><g data-mml-node="mn" transform="translate(505,-340.9) scale(0.707)"><path data-c="30" d="M96 585Q152 666 249 666 297 666 345 640T423 548Q460 465 460 320 460 165 417 83 397 41 362 16T301-15 250-22Q224-22 198-16T137 16 82 83Q39 165 39 320 39 494 96 585ZM321 597Q291 629 250 629 208 629 178 597 153 571 145 525T137 333Q137 175 145 125T181 46Q209 16 250 16 290 16 318 46 347 76 354 130T362 333Q362 478 354 524T321 597Z"/></g></g><g data-mml-node="msup" transform="translate(5410.4,0)"><g data-mml-node="mi"><path data-c="1D452" d="M39 168Q39 225 58 272T107 350 174 402 244 433 307 442H310Q355 442 388 420T421 355Q421 265 310 237 261 224 176 223 139 223 138 221 138 219 132 186T125 128Q125 81 146 54T209 26 302 45 394 111Q403 121 406 121 410 121 419 112T429 98 420 82 390 55 344 24 281-1 205-11Q126-11 83 42T39 168ZM373 353Q367 405 305 405 272 405 244 391T199 357 170 316 154 280 149 261Q149 260 169 260 282 260 327 284T373 353Z"/></g><g data-mml-node="TeXAtom" transform="translate(499,363) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mo"><path data-c="2212" d="M84 237T84 250 98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"/></g><g data-mml-node="mi" transform="translate(778,0)"><path data-c="1D465" d="M52 289Q59 331 106 386T222 442Q257 442 286 424T329 379Q371 442 430 442 467 442 494 420T522 361Q522 332 508 314T481 292 458 288Q439 288 427 299T415 328Q415 374 465 391 454 404 425 404 412 404 406 402 368 386 350 336 290 115 290 78 290 50 306 38T341 26Q378 26 414 59T463 140Q466 150 469 151T485 153H489Q504 153 504 145 504 144 502 134 486 77 440 33T333-11Q263-11 227 52 186-10 133-10H127Q78-10 57 16T35 71Q35 103 54 123T99 143Q142 143 142 101 142 81 130 66T107 46 94 41L91 40Q91 39 97 36T113 29 132 26Q168 26 194 71 203 87 217 139T245 247 261 313Q266 340 266 352 266 380 251 392T217 404Q177 404 142 372T93 290Q91 281 88 280T72 278H58Q52 284 52 289Z"/></g></g></g><g data-mml-node="mi" transform="translate(6914,0)"><path data-c="1D451" d="M366 683Q367 683 438 688T511 694Q523 694 523 686 523 679 450 384T375 83 374 68Q374 26 402 26 411 27 422 35 443 55 463 131 469 151 473 152 475 153 483 153H487 491Q506 153 506 145 506 140 503 129 490 79 473 48T445 8 417-8Q409-10 393-10 359-10 336 5T306 36L300 51Q299 52 296 50 294 48 292 46 233-10 172-10 117-10 75 30T33 157Q33 205 53 255T101 341Q148 398 195 420T280 442Q336 442 364 400 369 394 369 396 370 400 396 505T424 616Q424 629 417 632T378 637H357Q351 643 351 645T353 664Q358 683 366 683ZM352 326Q329 405 277 405 242 405 210 374T160 293Q131 214 119 129 119 126 119 118T118 106Q118 61 136 44T179 26Q233 26 290 98L298 109 352 326Z"/></g><g data-mml-node="mi" transform="translate(7434,0)"><path data-c="1D465" d="M52 289Q59 331 106 386T222 442Q257 442 286 424T329 379Q371 442 430 442 467 442 494 420T522 361Q522 332 508 314T481 292 458 288Q439 288 427 299T415 328Q415 374 465 391 454 404 425 404 412 404 406 402 368 386 350 336 290 115 290 78 290 50 306 38T341 26Q378 26 414 59T463 140Q466 150 469 151T485 153H489Q504 153 504 145 504 144 502 134 486 77 440 33T333-11Q263-11 227 52 186-10 133-10H127Q78-10 57 16T35 71Q35 103 54 123T99 143Q142 143 142 101 142 81 130 66T107 46 94 41L91 40Q91 39 97 36T113 29 132 26Q168 26 194 71 203 87 217 139T245 247 261 313Q266 340 266 352 266 380 251 392T217 404Q177 404 142 372T93 290Q91 281 88 280T72 278H58Q52 284 52 289Z"/></g><g data-mml-node="mo" transform="translate(8283.7,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347 722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153 722 140 707 133H70Q56 140 56 153Z"/></g><g data-mml-node="mn" transform="translate(9339.5,0)"><path data-c="31" d="M213 578 200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641 273 663Q275 666 285 666 294 666 302 660V361L303 61Q310 54 315 52T339 48 401 46H427V0H416Q395 3 257 3 121 3 100 0H88V46H114Q136 46 152 46T177 47 193 50 201 52 207 57 213 61V578Z"/></g></g></g></svg></mjx-container></p><p>当<mjx-container class="MathJax" jax="SVG"><svg style="vertical-align:-.781ex" xmlns="http://www.w3.org/2000/svg" width="6.26ex" height="2.737ex" role="img" focusable="false" viewBox="0 -864.9 2767.1 1209.9"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="1D6FC" d="M34 156Q34 270 120 356T309 442Q379 442 421 402T478 304Q484 275 485 237V208Q534 282 560 374 564 388 566 390T582 393Q603 393 603 385 603 376 594 346T558 261 497 161L486 147 487 123Q489 67 495 47T514 26Q528 28 540 37T557 60Q559 67 562 68T577 70Q597 70 597 62 597 56 591 43 579 19 556 5T512-10H505Q438-10 414 62L411 69 400 61Q390 53 370 41T325 18 267-2 203-11Q124-11 79 39T34 156ZM208 26Q257 26 306 47T379 90L403 112Q401 255 396 290 382 405 304 405 235 405 183 332 156 292 139 224T121 120Q121 71 146 49T208 26Z"/></g><g data-mml-node="mo" transform="translate(917.8,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347 722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153 722 140 707 133H70Q56 140 56 153Z"/></g><g data-mml-node="mfrac" transform="translate(1973.6,0)"><g data-mml-node="mn" transform="translate(220,394) scale(0.707)"><path data-c="31" d="M213 578 200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641 273 663Q275 666 285 666 294 666 302 660V361L303 61Q310 54 315 52T339 48 401 46H427V0H416Q395 3 257 3 121 3 100 0H88V46H114Q136 46 152 46T177 47 193 50 201 52 207 57 213 61V578Z"/></g><g data-mml-node="mn" transform="translate(220,-345) scale(0.707)"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315 301 241Q265 210 201 149L142 93 218 92Q375 92 385 97 392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19 31Q50 38 56 46T86 81Q115 113 136 137 145 147 170 174T204 211 233 244 261 278 284 308 305 340 320 369 333 401 340 431 343 464Q343 527 309 573T212 619Q179 619 154 602T119 569 109 550Q109 549 114 549 132 549 151 535T170 489Q170 464 154 447T109 429Z"/></g><rect width="553.6" height="60" x="120" y="220"/></g></g></g></svg></mjx-container>时，<mjx-container class="MathJax" jax="SVG"><svg style="vertical-align:-.806ex" xmlns="http://www.w3.org/2000/svg" width="26.405ex" height="2.962ex" role="img" focusable="false" viewBox="0 -952.7 11671.2 1309.1"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="393" d="M128 619Q121 626 117 628T101 631 58 634H25V680H554V676Q556 670 568 560T582 444V440H542V444Q542 445 538 478T523 545 492 598Q454 634 349 634H334Q264 634 249 633T233 621Q232 618 232 339L233 61Q240 54 245 52T270 48 333 46H360V0H348Q324 3 182 3 51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z"/></g><g data-mml-node="mo" transform="translate(625,0)"><path data-c="28" d="M94 250Q94 319 104 381T127 488 164 576 202 643 244 695 277 729 302 750H315 319Q333 750 333 741 333 738 316 720T275 667 226 581 184 443 167 250 184 58 225-81 274-167 316-220 333-241Q333-250 318-250H315 302L274-226Q180-141 137-14T94 250Z"/></g><g data-mml-node="mfrac" transform="translate(1014,0)"><g data-mml-node="mn" transform="translate(220,394) scale(0.707)"><path data-c="31" d="M213 578 200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641 273 663Q275 666 285 666 294 666 302 660V361L303 61Q310 54 315 52T339 48 401 46H427V0H416Q395 3 257 3 121 3 100 0H88V46H114Q136 46 152 46T177 47 193 50 201 52 207 57 213 61V578Z"/></g><g data-mml-node="mn" transform="translate(220,-345) scale(0.707)"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315 301 241Q265 210 201 149L142 93 218 92Q375 92 385 97 392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19 31Q50 38 56 46T86 81Q115 113 136 137 145 147 170 174T204 211 233 244 261 278 284 308 305 340 320 369 333 401 340 431 343 464Q343 527 309 573T212 619Q179 619 154 602T119 569 109 550Q109 549 114 549 132 549 151 535T170 489Q170 464 154 447T109 429Z"/></g><rect width="553.6" height="60" x="120" y="220"/></g><g data-mml-node="mo" transform="translate(1807.6,0)"><path data-c="29" d="M60 749 64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12 224-76 186-143 145-194 113-227 90-246Q87-249 86-250H74Q66-250 63-250T58-247 55-238Q56-237 66-225 221-64 221 250T66 725Q56 737 55 738 55 746 60 749Z"/></g><g data-mml-node="mo" transform="translate(2474.3,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347 722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153 722 140 707 133H70Q56 140 56 153Z"/></g><g data-mml-node="mn" transform="translate(3530.1,0)"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315 301 241Q265 210 201 149L142 93 218 92Q375 92 385 97 392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19 31Q50 38 56 46T86 81Q115 113 136 137 145 147 170 174T204 211 233 244 261 278 284 308 305 340 320 369 333 401 340 431 343 464Q343 527 309 573T212 619Q179 619 154 602T119 569 109 550Q109 549 114 549 132 549 151 535T170 489Q170 464 154 447T109 429Z"/></g><g data-mml-node="msubsup" transform="translate(4196.8,0)"><g data-mml-node="mo" transform="translate(0 0.5)"><path data-c="222B" d="M113-244Q113-246 119-251T139-263 167-269Q186-269 199-260 220-247 232-218T251-133 262-15 276 155 297 367Q300 390 305 438T314 512 325 580 340 647 361 703 390 751 428 784 479 804Q481 804 488 804T501 805Q552 802 581 769T610 695Q610 669 594 657T561 645Q542 645 527 658T512 694Q512 705 516 714T526 729 538 737 548 742L552 743Q552 745 545 751T525 762 498 768Q475 768 460 756T434 716 418 652 407 559 398 444 387 300 369 133Q349-38 337-102T303-207Q256-306 169-306 119-306 87-272T55-196Q55-170 71-158T104-146Q123-146 138-159T153-195Q153-206 149-215T139-230 127-238 117-242L113-244Z"/></g><g data-mml-node="TeXAtom" transform="translate(699.9,532.6) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mo"><path data-c="2B" d="M56 237T56 250 70 270H369V420L370 570Q380 583 389 583 402 583 409 568V270H707Q722 262 722 250T707 230H409V-68Q401-82 391-82H389 387Q375-82 369-68V230H70Q56 237 56 250Z"/></g><g data-mml-node="mi" transform="translate(778,0)"><path data-c="221E" d="M55 217Q55 305 111 373T254 442Q342 442 419 381 457 350 493 303L507 284 514 294Q618 442 747 442 833 442 888 374T944 214Q944 128 889 59T743-11Q657-11 580 50 542 81 506 128L492 147 485 137Q381-11 252-11 166-11 111 57T55 217ZM907 217Q907 285 869 341T761 397Q740 397 720 392T682 378 648 359 619 335 594 310 574 285 559 263 548 246L543 238 574 198Q605 158 622 138T664 94 714 61 765 51Q827 51 867 100T907 217ZM92 214Q92 145 131 89T239 33Q357 33 456 193L425 233Q364 312 334 337 285 380 233 380 171 380 132 331T92 214Z"/></g></g><g data-mml-node="mn" transform="translate(505,-340.9) scale(0.707)"><path data-c="30" d="M96 585Q152 666 249 666 297 666 345 640T423 548Q460 465 460 320 460 165 417 83 397 41 362 16T301-15 250-22Q224-22 198-16T137 16 82 83Q39 165 39 320 39 494 96 585ZM321 597Q291 629 250 629 208 629 178 597 153 571 145 525T137 333Q137 175 145 125T181 46Q209 16 250 16 290 16 318 46 347 76 354 130T362 333Q362 478 354 524T321 597Z"/></g></g><g data-mml-node="msup" transform="translate(6370.6,0)"><g data-mml-node="mi"><path data-c="1D452" d="M39 168Q39 225 58 272T107 350 174 402 244 433 307 442H310Q355 442 388 420T421 355Q421 265 310 237 261 224 176 223 139 223 138 221 138 219 132 186T125 128Q125 81 146 54T209 26 302 45 394 111Q403 121 406 121 410 121 419 112T429 98 420 82 390 55 344 24 281-1 205-11Q126-11 83 42T39 168ZM373 353Q367 405 305 405 272 405 244 391T199 357 170 316 154 280 149 261Q149 260 169 260 282 260 327 284T373 353Z"/></g><g data-mml-node="TeXAtom" transform="translate(499,363) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mo"><path data-c="2212" d="M84 237T84 250 98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"/></g><g data-mml-node="msup" transform="translate(778,0)"><g data-mml-node="mi"><path data-c="1D461" d="M26 385Q19 392 19 395 19 399 22 411T27 425Q29 430 36 430T87 431H140L159 511Q162 522 166 540T173 566 179 586 187 603 197 615 211 624 229 626Q247 625 254 615T261 596Q261 589 252 549T232 470L222 433Q222 431 272 431H323Q330 424 330 420 330 398 317 385H210L174 240Q135 80 135 68 135 26 162 26 197 26 230 60T283 144Q285 150 288 151T303 153H307Q322 153 322 145 322 142 319 133 314 117 301 95T267 48 216 6 155-11Q125-11 98 4T59 56Q57 64 57 83V101L92 241Q127 382 128 383 128 385 77 385H26Z"/></g><g data-mml-node="mn" transform="translate(394,363) scale(0.707)"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315 301 241Q265 210 201 149L142 93 218 92Q375 92 385 97 392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19 31Q50 38 56 46T86 81Q115 113 136 137 145 147 170 174T204 211 233 244 261 278 284 308 305 340 320 369 333 401 340 431 343 464Q343 527 309 573T212 619Q179 619 154 602T119 569 109 550Q109 549 114 549 132 549 151 535T170 489Q170 464 154 447T109 429Z"/></g></g></g></g><g data-mml-node="mi" transform="translate(8033.7,0)"><path data-c="1D451" d="M366 683Q367 683 438 688T511 694Q523 694 523 686 523 679 450 384T375 83 374 68Q374 26 402 26 411 27 422 35 443 55 463 131 469 151 473 152 475 153 483 153H487 491Q506 153 506 145 506 140 503 129 490 79 473 48T445 8 417-8Q409-10 393-10 359-10 336 5T306 36L300 51Q299 52 296 50 294 48 292 46 233-10 172-10 117-10 75 30T33 157Q33 205 53 255T101 341Q148 398 195 420T280 442Q336 442 364 400 369 394 369 396 370 400 396 505T424 616Q424 629 417 632T378 637H357Q351 643 351 645T353 664Q358 683 366 683ZM352 326Q329 405 277 405 242 405 210 374T160 293Q131 214 119 129 119 126 119 118T118 106Q118 61 136 44T179 26Q233 26 290 98L298 109 352 326Z"/></g><g data-mml-node="mi" transform="translate(8553.7,0)"><path data-c="1D461" d="M26 385Q19 392 19 395 19 399 22 411T27 425Q29 430 36 430T87 431H140L159 511Q162 522 166 540T173 566 179 586 187 603 197 615 211 624 229 626Q247 625 254 615T261 596Q261 589 252 549T232 470L222 433Q222 431 272 431H323Q330 424 330 420 330 398 317 385H210L174 240Q135 80 135 68 135 26 162 26 197 26 230 60T283 144Q285 150 288 151T303 153H307Q322 153 322 145 322 142 319 133 314 117 301 95T267 48 216 6 155-11Q125-11 98 4T59 56Q57 64 57 83V101L92 241Q127 382 128 383 128 385 77 385H26Z"/></g><g data-mml-node="mo" transform="translate(9192.4,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347 722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153 722 140 707 133H70Q56 140 56 153Z"/></g><g data-mml-node="msqrt" transform="translate(10248.2,0)"><g transform="translate(853,0)"><g data-mml-node="mi"><path data-c="1D70B" d="M132-11Q98-11 98 22V33L111 61Q186 219 220 334L228 358H196Q158 358 142 355T103 336Q92 329 81 318T62 297 53 285Q51 284 38 284 19 284 19 294 19 300 38 329T93 391 164 429Q171 431 389 431 549 431 553 430 573 423 573 402 573 371 541 360 535 358 472 358H408L405 341Q393 269 393 222 393 170 402 129T421 65 431 37Q431 20 417 5T381-10Q370-10 363-7T347 17 331 77Q330 86 330 121 330 170 339 226T357 318 367 358H269L268 354Q268 351 249 275T206 114 175 17Q164-11 132-11Z"/></g></g><g data-mml-node="mo" transform="translate(0,-22.5)"><path data-c="221A" d="M95 178Q89 178 81 186T72 200 103 230 169 280 207 309Q209 311 212 311H213Q219 311 227 294T281 177Q300 134 312 108L397-77Q398-77 501 136T707 565 814 786Q820 800 834 800 841 800 846 794T853 782V776L620 293 385-193Q381-200 366-200 357-200 354-197 352-195 256 15L160 225 144 214Q129 202 113 190T95 178Z"/></g><rect width="570" height="60" x="853" y="717.5"/></g></g></g></svg></mjx-container></p><p>如：</p><p><mjx-container class="MathJax" jax="SVG"><svg style="vertical-align:-.566ex" xmlns="http://www.w3.org/2000/svg" width="52.326ex" height="2.262ex" role="img" focusable="false" viewBox="0 -750 23128.1 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="393" d="M128 619Q121 626 117 628T101 631 58 634H25V680H554V676Q556 670 568 560T582 444V440H542V444Q542 445 538 478T523 545 492 598Q454 634 349 634H334Q264 634 249 633T233 621Q232 618 232 339L233 61Q240 54 245 52T270 48 333 46H360V0H348Q324 3 182 3 51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z"/></g><g data-mml-node="mo" transform="translate(625,0)"><path data-c="28" d="M94 250Q94 319 104 381T127 488 164 576 202 643 244 695 277 729 302 750H315 319Q333 750 333 741 333 738 316 720T275 667 226 581 184 443 167 250 184 58 225-81 274-167 316-220 333-241Q333-250 318-250H315 302L274-226Q180-141 137-14T94 250Z"/></g><g data-mml-node="mn" transform="translate(1014,0)"><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664 351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336 375 315Q457 262 457 175 457 96 395 37T238-22Q158-22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94 148 82 136 74 126 70 118 67L114 66Q165 21 238 21 293 21 321 74 338 107 338 175V195Q338 290 274 322 259 328 213 329L171 330 168 332Q166 335 166 348 166 366 174 366 202 366 232 371 266 376 294 413T322 525V533Q322 590 287 612 265 626 240 626 208 626 181 615T143 592 132 580H135Q138 579 143 578T153 573 165 566 175 555 183 540 186 520Q186 498 172 481T127 463Z"/></g><g data-mml-node="mo" transform="translate(1514,0)"><path data-c="29" d="M60 749 64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12 224-76 186-143 145-194 113-227 90-246Q87-249 86-250H74Q66-250 63-250T58-247 55-238Q56-237 66-225 221-64 221 250T66 725Q56 737 55 738 55 746 60 749Z"/></g><g data-mml-node="mo" transform="translate(2180.8,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347 722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153 722 140 707 133H70Q56 140 56 153Z"/></g><g data-mml-node="mi" transform="translate(3236.6,0)"><path data-c="393" d="M128 619Q121 626 117 628T101 631 58 634H25V680H554V676Q556 670 568 560T582 444V440H542V444Q542 445 538 478T523 545 492 598Q454 634 349 634H334Q264 634 249 633T233 621Q232 618 232 339L233 61Q240 54 245 52T270 48 333 46H360V0H348Q324 3 182 3 51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z"/></g><g data-mml-node="mo" transform="translate(3861.6,0)"><path data-c="28" d="M94 250Q94 319 104 381T127 488 164 576 202 643 244 695 277 729 302 750H315 319Q333 750 333 741 333 738 316 720T275 667 226 581 184 443 167 250 184 58 225-81 274-167 316-220 333-241Q333-250 318-250H315 302L274-226Q180-141 137-14T94 250Z"/></g><g data-mml-node="mn" transform="translate(4250.6,0)"><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664 351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336 375 315Q457 262 457 175 457 96 395 37T238-22Q158-22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94 148 82 136 74 126 70 118 67L114 66Q165 21 238 21 293 21 321 74 338 107 338 175V195Q338 290 274 322 259 328 213 329L171 330 168 332Q166 335 166 348 166 366 174 366 202 366 232 371 266 376 294 413T322 525V533Q322 590 287 612 265 626 240 626 208 626 181 615T143 592 132 580H135Q138 579 143 578T153 573 165 566 175 555 183 540 186 520Q186 498 172 481T127 463Z"/></g><g data-mml-node="mo" transform="translate(4972.8,0)"><path data-c="2B" d="M56 237T56 250 70 270H369V420L370 570Q380 583 389 583 402 583 409 568V270H707Q722 262 722 250T707 230H409V-68Q401-82 391-82H389 387Q375-82 369-68V230H70Q56 237 56 250Z"/></g><g data-mml-node="mn" transform="translate(5973,0)"><path data-c="31" d="M213 578 200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641 273 663Q275 666 285 666 294 666 302 660V361L303 61Q310 54 315 52T339 48 401 46H427V0H416Q395 3 257 3 121 3 100 0H88V46H114Q136 46 152 46T177 47 193 50 201 52 207 57 213 61V578Z"/></g><g data-mml-node="mo" transform="translate(6473,0)"><path data-c="29" d="M60 749 64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12 224-76 186-143 145-194 113-227 90-246Q87-249 86-250H74Q66-250 63-250T58-247 55-238Q56-237 66-225 221-64 221 250T66 725Q56 737 55 738 55 746 60 749Z"/></g><g data-mml-node="mo" transform="translate(7139.8,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347 722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153 722 140 707 133H70Q56 140 56 153Z"/></g><g data-mml-node="mn" transform="translate(8195.6,0)"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315 301 241Q265 210 201 149L142 93 218 92Q375 92 385 97 392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19 31Q50 38 56 46T86 81Q115 113 136 137 145 147 170 174T204 211 233 244 261 278 284 308 305 340 320 369 333 401 340 431 343 464Q343 527 309 573T212 619Q179 619 154 602T119 569 109 550Q109 549 114 549 132 549 151 535T170 489Q170 464 154 447T109 429Z"/></g><g data-mml-node="mi" transform="translate(8695.6,0)"><path data-c="393" d="M128 619Q121 626 117 628T101 631 58 634H25V680H554V676Q556 670 568 560T582 444V440H542V444Q542 445 538 478T523 545 492 598Q454 634 349 634H334Q264 634 249 633T233 621Q232 618 232 339L233 61Q240 54 245 52T270 48 333 46H360V0H348Q324 3 182 3 51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z"/></g><g data-mml-node="mo" transform="translate(9320.6,0)"><path data-c="28" d="M94 250Q94 319 104 381T127 488 164 576 202 643 244 695 277 729 302 750H315 319Q333 750 333 741 333 738 316 720T275 667 226 581 184 443 167 250 184 58 225-81 274-167 316-220 333-241Q333-250 318-250H315 302L274-226Q180-141 137-14T94 250Z"/></g><g data-mml-node="mn" transform="translate(9709.6,0)"><path 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class="story post-story"><h2 id="参考文献"><a href="#参考文献" class="headerlink" title="参考文献"></a>参考文献</h2><p><a target="_blank" rel="external nofollow noopener noreferrer" href="https://zh.wikipedia.org/wiki/%CE%93%E5%87%BD%E6%95%B0">Γ 函数 wikipedia</a></p></div></div><div class="footer"><div class="copyright license"><div class="license-title">离散世界与连续世界的联系</div><div class="license-link"><a href="https://blog.mhuig.top/p/2b995a0c/">https://blog.mhuig.top/p/2b995a0c/</a></div><div class="license-meta"><div class="license-meta-item"><div class="license-meta-title">本文作者</div><div class="license-meta-text">MHuiG</div></div><div class="license-meta-item"><div class="license-meta-title">发布于</div><div class="license-meta-text">2021年1月2日</div></div><div class="license-meta-item"><div class="license-meta-title">许可协议</div><div class="license-meta-text"><a href="https://creativecommons.org/licenses/by-nc-sa/4.0/deed.zh#" target="_blank" rel="external nofollow noopener noreferrer">CC BY-NC-SA 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