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type="application/xml" title="MHuiG Blog Site Map" href="https://blog.mhuig.top/sitemap.xml"><link rel="author" href="https://mhuig.top"><meta name="author" content="MHuiG"><meta name="creator" content="MHuiG"><link rel="archives" href="https://blog.mhuig.top/archives/"><link rel="preload" href="/css/style.css" as="style"><link rel="preload" href="https://static.mhuig.top/npm/volantis-static@0.0.1660614606622/media/fonts/VarelaRound/VarelaRound-Regular.ttf" as="font" type="font/ttf" crossorigin="anonymous"><link rel="preload" href="https://static.mhuig.top/npm/volantis-static@0.0.1660614606622/media/fonts/VarelaRound/VarelaRound-Regular.ttf" as="font" type="font/ttf" crossorigin="anonymous"><link rel="alternate" href="/atom.xml" title="Magicland" type="application/atom+xml"><link rel="alternate" href="/rss2.xml" title="Magicland" type="application/rss+xml"><title>离散世界与连续世界的联系 - Magicland</title><meta name="keywords" content="数学, Math,MHuiG, @MHuiG, Blog, 博客, Magicland, 魔法世界"><meta desc="" name="description" content="本文探讨离散与连续数学世界的联系，聚焦伽玛函数如何实现阶乘的连续化表达。通过推导伽玛函数积分形式及递推关系Γ(α+1)=αΓ(α)，证明其与阶乘的等价性Γ(n+1)=n!，并给出Γ(1/2)=√π等特殊值计算。 - MHuiG - Magicland"><meta property="og:type" content="article"><meta property="og:title" content="离散世界与连续世界的联系"><meta property="og:url" content="https://blog.mhuig.top/p/2b995a0c/"><meta property="og:site_name" content="Magicland"><meta property="og:description" content="本文探讨离散与连续数学世界的联系，聚焦伽玛函数如何实现阶乘的连续化表达。通过推导伽玛函数积分形式及递推关系Γ(α+1)=αΓ(α)，证明其与阶乘的等价性Γ(n+1)=n!，并给出Γ(1/2)=√π等特殊值计算。"><meta property="og:locale"><meta property="og:image" content="https://blog.mhuig.top/lib/favicon/android-chrome-192x192.png"><meta property="article:published_time" content="2021-01-02T12:34:00.000Z"><meta property="article:modified_time" content="2025-11-20T10:18:00.000Z"><meta property="article:author" content="MHuiG"><meta property="article:tag" content="Math"><meta name="twitter:card" content="summary"><meta name="twitter:image" 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class="fa-brands fa-expeditedssl fa-fw"></i> SSL Status</a></li></ul></li><hr><li><a class="menuitem flat-box faa-parent animated-hover" title="工具箱"><i class="fa-duotone fa-tools fa-fw"></i> 工具箱</a><ul class="list-v"><li><a class="menuitem flat-box faa-parent animated-hover" target="_blank" rel="external nofollow noopener noreferrer" href="https://rssbox.mhuig.top/" title="RSS Box" active-action="action-https:rssboxmhuigtop"><i class="fa-duotone fa-conveyor-belt-boxes fa-fw"></i> RSS Box</a></li><li><a class="menuitem flat-box faa-parent animated-hover" href="/havefun/Coco/" title="My Cat" active-action="action-havefunCoco"><i class="fa-duotone fa-cat fa-fw"></i> My Cat</a></li><li><a class="menuitem flat-box faa-parent animated-hover" href="/pages/talk/" title="碎言碎语" active-action="action-pagestalk"><i class="fa-duotone fa-comments fa-fw"></i> 碎言碎语</a></li></ul></li><hr><li><a class="menuitem flat-box faa-parent animated-hover" target="_blank" rel="external nofollow noopener noreferrer" href="https://github.com/MHuiG" title="GitHub" active-action="action-https:githubcomMHuiG"><i class="fa-brands fa-github fa-fw"></i> GitHub</a></li></ul></li></ul></li></ul></div></div></div></header><div id="l_body"><div id="l_cover"><div id="none" class="cover-wrapper post featured" style="display:none"><div class="cover-bg lazyload placeholder" data-bg=""></div><div class="cover-body"><div class="top"><p class="title">Magicland</p><p class="subtitle">「看庭前花开花落,望天上云卷云舒」</p></div><div class="bottom"><div 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="Magicland"></span><span hidden="" itemprop="post" itemscope="" itemtype="http://schema.org/CreativeWork"><meta itemprop="name" content="离散世界与连续世界的联系"><meta itemprop="description" content="本文探讨离散与连续数学世界的联系，聚焦伽玛函数如何实现阶乘的连续化表达。通过推导伽玛函数积分形式及递推关系Γ(α+1)=αΓ(α)，证明其与阶乘的等价性Γ(n+1)=n!，并给出Γ(1/2)=√π等特殊值计算。"></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" alt="author"><img itemprop="image" src="/lib/avatar/avatar-16.webp" 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" overflow="overflow"><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" data-latex="n!"><g data-mml-node="mi" data-latex="n"><path data-c="1D45B" d="M537 137C514 58 481 18 440 18 427 18 420 28 420 47 420 61 426 84 438 115 478 224 498 296 498 333 498 403 451 442 381 442 322 442 271 416 230 363 222 407 187 442 136 442 80 442 58 390 44 345 34 313 29 294 29 287 29 278 34 273 45 273 50 273 53 274 56 276 61 285 64 292 65 299 83 375 106 413 133 413 151 413 160 399 160 371 160 358 155 331 144 290L87 63C84 50 78 24 78 19 78-1 89-11 111-11 130-11 144-1 151 19 153 24 159 49 170 92L191 181 221 295C232 318 249 341 270 365 299 397 335 413 378 413 411 413 427 391 427 348 427 310 406 234 363 120 356 102 353 87 353 74 353 25 390-11 438-11 482-11 517 14 542 64 561 104 571 131 571 144 571 153 566 158 555 158 552 158 537 149 537 137Z"></path></g><g data-mml-node="mo" data-latex="!" transform="translate(600,0)"><path data-c="21" d="M139 716C110 716 83 691 86 661L122 211C123 194 129 185 139 185 149 185 155 193 156 210L192 661C195 691 168 716 139 716M192 56C192 87 169 113 139 113 109 113 86 87 86 56 86 26 109 0 139 0 169 0 192 26 192 56Z"></path></g></g></g></svg></mjx-container>能不能用连续世界的积分<mjx-container class="MathJax" jax="SVG" overflow="overflow"><svg style="vertical-align:-.691ex" xmlns="http://www.w3.org/2000/svg" width="1.505ex" height="2.514ex" role="img" focusable="false" viewBox="0 -805.5 665 1111"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math" data-latex="\int"><g data-mml-node="mo" data-latex="\int" transform="translate(0 0.5)"><path data-c="222B" d="M497 805C421 805 370 747 344 630 340 613 335 578 328 526L315 425C301 313 292 230 288 175L269-72C262-169 246-276 168-276 147-276 129-271 114-261 135-255 146-241 146-219 146-192 128-173 101-173 71-173 56-189 56-220 56-273 111-306 168-306 249-306 305-246 335-127 356-43 375 107 391 324L410 571C414 628 421 673 430 705 443 747 452 775 498 775 519 775 537 770 551 760 530 754 519 740 519 718 519 691 537 672 564 672 594 672 609 688 609 719 609 772 554 805 497 805Z"></path></g></g></g></svg></mjx-container> 来表达。</p><p><mjx-container class="MathJax" jax="SVG" overflow="overflow" display="true" width="full" style="min-width:17.734ex"><svg style="vertical-align:-1.948ex;min-width:17.734ex" 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" data-latex="
n!=\int?
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data-c="3D" d="M698 367 80 367C64 367 56 359 56 344 56 329 64 321 80 321L698 321C714 321 722 329 722 344 722 356 711 367 698 367M698 179 80 179C64 179 56 171 56 156 56 141 64 133 80 133L698 133C714 133 722 141 722 156 722 169 711 179 698 179Z"></path></g><g data-mml-node="mi" data-latex="\alpha" transform="translate(1055.8,0)"><path data-c="1D6FC" d="M310 442C241 442 179 412 124 353 69 294 41 229 41 159 41 61 107-11 205-11 274-11 342 16 410 69 425 16 456-11 502-11 538-11 589 27 589 63 589 72 584 76 573 76 566 76 560 72 557 64 549 43 528 18 505 18 488 18 479 50 479 115 479 129 482 140 488 147 515 180 539 218 558 260 583 314 598 354 602 380L602 384C599 391 593 394 586 394 581 393 575 385 568 371 547 299 518 237 479 186L479 236C479 352 421 442 310 442M403 211C403 152 404 116 405 103 340 46 274 18 207 18 150 18 122 53 122 122 122 180 155 288 178 324 216 383 260 413 309 413 340 413 361 401 374 377 381 365 386 353 391 342 399 319 403 258 403 211Z"></path></g><g data-mml-node="msubsup" 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335-11 383-11 423 12 455 57 482 96 496 125 496 144 496 153 491 158 481 158 472 158 467 153 464 144 447 87 402 18 337 18 304 18 287 38 287 79 287 92 292 120 303 165L337 300C356 375 387 413 431 413 445 413 458 410 469 405 442 396 429 378 429 351 429 325 443 312 470 312 502 312 527 341 527 373Z"></path></g></g></g><g data-mml-node="mi" data-latex="d" transform="translate(7605.2,0)"><path data-c="1D451" d="M429 632 370 389C349 426 320 445 281 445 216 445 159 412 109 345 63 283 40 218 40 151 40 63 91-11 175-11 218-11 260 12 300 59 311 21 345-11 392-11 461-11 483 71 498 145 498 154 493 159 483 159 474 159 468 152 465 138 445 59 421 19 394 19 377 19 368 33 368 60 368 75 370 91 374 107L516 679 516 683C513 690 507 694 499 694 476 694 434 690 374 683 363 682 357 674 357 660 357 650 366 645 384 645 403 645 429 646 429 632M341 376C351 355 356 341 356 332 355 328 354 323 353 316L304 122C301 111 294 99 285 87 248 42 212 19 177 19 138 19 118 49 118 108 118 132 124 168 136 216 157 301 187 359 224 390 244 407 263 415 282 415 309 415 329 402 341 376Z"></path></g><g data-mml-node="mi" data-latex="x" transform="translate(8125.2,0)"><path data-c="1D465" d="M527 373C527 419 482 442 432 442 389 442 355 419 329 373 308 419 273 442 222 442 173 442 133 419 101 374 74 335 60 306 60 287 60 278 65 273 75 273 84 273 90 278 92 287 111 345 153 413 220 413 253 413 269 392 269 351 269 330 251 252 216 118 199 51 169 18 126 18 112 18 99 21 88 26 114 36 127 54 127 80 127 106 114 119 87 119 54 119 29 91 29 58 29 12 76-11 125-11 167-11 201 12 228 58 247 12 283-11 335-11 383-11 423 12 455 57 482 96 496 125 496 144 496 153 491 158 481 158 472 158 467 153 464 144 447 87 402 18 337 18 304 18 287 38 287 79 287 92 292 120 303 165L337 300C356 375 387 413 431 413 445 413 458 410 469 405 442 396 429 378 429 351 429 325 443 312 470 312 502 312 527 341 527 373Z"></path></g></g></g></svg></mjx-container></p><p><mjx-container class="MathJax" jax="SVG" overflow="overflow"><svg style="vertical-align:-.561ex" xmlns="http://www.w3.org/2000/svg" width="8.459ex" height="2.253ex" role="img" focusable="false" viewBox="0 -748 3738.8 996"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math" data-latex="=\alpha\Gamma(\alpha)"><g data-mml-node="mo" data-latex="="><path data-c="3D" d="M698 367 80 367C64 367 56 359 56 344 56 329 64 321 80 321L698 321C714 321 722 329 722 344 722 356 711 367 698 367M698 179 80 179C64 179 56 171 56 156 56 141 64 133 80 133L698 133C714 133 722 141 722 156 722 169 711 179 698 179Z"></path></g><g data-mml-node="mi" data-latex="\alpha" transform="translate(1055.8,0)"><path data-c="1D6FC" d="M310 442C241 442 179 412 124 353 69 294 41 229 41 159 41 61 107-11 205-11 274-11 342 16 410 69 425 16 456-11 502-11 538-11 589 27 589 63 589 72 584 76 573 76 566 76 560 72 557 64 549 43 528 18 505 18 488 18 479 50 479 115 479 129 482 140 488 147 515 180 539 218 558 260 583 314 598 354 602 380L602 384C599 391 593 394 586 394 581 393 575 385 568 371 547 299 518 237 479 186L479 236C479 352 421 442 310 442M403 211C403 152 404 116 405 103 340 46 274 18 207 18 150 18 122 53 122 122 122 180 155 288 178 324 216 383 260 413 309 413 340 413 361 401 374 377 381 365 386 353 391 342 399 319 403 258 403 211Z"></path></g><g data-mml-node="mi" data-latex="\Gamma" transform="translate(1695.8,0)"><path data-c="393" d="M274 641 376 641C443 641 487 626 509 596 538 555 541 520 550 450L583 450 554 680 33 680 33 641 61 641C96 641 117 639 124 634 131 629 135 617 135 599L135 81C135 63 131 51 124 46 117 41 96 39 61 39L33 39 33 0C59 2 110 3 187 3 274 3 330 2 356 0L356 39 320 39C267 39 238 44 233 55 231 60 230 69 230 82L230 606C230 641 236 641 274 641Z"></path></g><g data-mml-node="mo" data-latex="(" transform="translate(2320.8,0)"><path data-c="28" d="M318-248C327-248 332-243 332-234 332-231 330-227 327-223 275-183 233-117 202-26 175 53 161 131 161 208L161 292C161 369 175 447 202 526 233 617 275 683 327 723 330 726 332 730 332 734 332 743 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188-131 229-40 268 47 288 129 288 208L288 292C288 371 268 453 229 540 188 631 138 699 78 745 75 747 72 748 71 748 62 748 57 743 57 734 57 730 59 726 62 723 114 683 156 617 187 526 214 447 228 369 228 292L228 208C228 131 214 53 187-26 156-117 114-183 62-223 59-227 57-231 57-234 57-243 62-248 71-248 72-248 75-247 78-245Z"></path></g></g></g></svg></mjx-container></p><p>得到：</p><p><mjx-container class="MathJax" jax="SVG" overflow="overflow" 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" data-latex="
\Gamma(\alpha+1)=\alpha\Gamma(\alpha)
"><g data-mml-node="mtable" data-latex="
\Gamma(\alpha+1)=\alpha\Gamma(\alpha)
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69 294 41 229 41 159 41 61 107-11 205-11 274-11 342 16 410 69 425 16 456-11 502-11 538-11 589 27 589 63 589 72 584 76 573 76 566 76 560 72 557 64 549 43 528 18 505 18 488 18 479 50 479 115 479 129 482 140 488 147 515 180 539 218 558 260 583 314 598 354 602 380L602 384C599 391 593 394 586 394 581 393 575 385 568 371 547 299 518 237 479 186L479 236C479 352 421 442 310 442M403 211C403 152 404 116 405 103 340 46 274 18 207 18 150 18 122 53 122 122 122 180 155 288 178 324 216 383 260 413 309 413 340 413 361 401 374 377 381 365 386 353 391 342 399 319 403 258 403 211Z"></path></g></g></g></svg><mjx-break size="4"></mjx-break><svg style="vertical-align:-.566ex" xmlns="http://www.w3.org/2000/svg" width="3.52ex" height="2.262ex" role="img" focusable="false" viewBox="0 -750 1555.8 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math" data-latex="\alpha=1"><g data-mml-node="mo" data-latex="="><path data-c="3D" d="M698 367 80 367C64 367 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data-mml-node="mi" data-latex="\Gamma"><path data-c="393" d="M274 641 376 641C443 641 487 626 509 596 538 555 541 520 550 450L583 450 554 680 33 680 33 641 61 641C96 641 117 639 124 634 131 629 135 617 135 599L135 81C135 63 131 51 124 46 117 41 96 39 61 39L33 39 33 0C59 2 110 3 187 3 274 3 330 2 356 0L356 39 320 39C267 39 238 44 233 55 231 60 230 69 230 82L230 606C230 641 236 641 274 641Z"></path></g><g data-mml-node="mo" data-latex="(" transform="translate(625,0)"><path data-c="28" d="M318-248C327-248 332-243 332-234 332-231 330-227 327-223 275-183 233-117 202-26 175 53 161 131 161 208L161 292C161 369 175 447 202 526 233 617 275 683 327 723 330 726 332 730 332 734 332 743 327 748 318 748 317 748 314 747 311 745 251 699 201 631 160 540 121 453 101 371 101 292L101 208C101 129 121 47 160-40 201-131 251-199 311-245 314-247 317-248 318-248Z"></path></g><g data-mml-node="mn" data-latex="1" transform="translate(1014,0)"><path data-c="31" d="M269 666C228 624 168 603 89 603L89 564C141 564 184 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324 216 383 260 413 309 413 340 413 361 401 374 377 381 365 386 353 391 342 399 319 403 258 403 211Z"></path></g></g></g></svg><mjx-break size="4"></mjx-break><svg style="vertical-align:-.781ex" xmlns="http://www.w3.org/2000/svg" width="4.184ex" height="2.737ex" role="img" focusable="false" viewBox="0 -864.9 1849.3 1209.9"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math" data-latex="\alpha=\frac{1}{2}"><g data-mml-node="mo" data-latex="="><path data-c="3D" d="M698 367 80 367C64 367 56 359 56 344 56 329 64 321 80 321L698 321C714 321 722 329 722 344 722 356 711 367 698 367M698 179 80 179C64 179 56 171 56 156 56 141 64 133 80 133L698 133C714 133 722 141 722 156 722 169 711 179 698 179Z"></path></g><g data-mml-node="mfrac" data-latex="\frac{1}{2}" transform="translate(1055.8,0)"><g data-mml-node="mn" transform="translate(220,394) scale(0.707)" data-latex="1"><path data-c="31" d="M269 666C228 624 168 603 89 603L89 564C141 564 184 572 217 588L217 82C217 64 213 52 204 47 195 42 170 39 130 39L95 39 95 0C120 2 174 3 257 3 340 3 394 2 419 0L419 39 384 39C343 39 318 42 310 47 302 52 297 64 297 82L297 636C297 660 295 666 269 666Z"></path></g><g data-mml-node="mn" transform="translate(220,-345) scale(0.707)" data-latex="2"><path data-c="32" d="M237 666C186 666 143 648 106 612 69 576 50 534 50 483 50 449 75 424 106 424 136 424 161 450 161 480 161 513 137 536 105 536 102 536 100 536 98 535 117 584 161 627 224 627 306 627 352 556 352 470 352 403 318 331 250 255L62 43C49 28 50 29 50 0L421 0 450 180 417 180C409 129 402 100 396 91 391 86 361 84 306 84L139 84 236 179C304 243 390 312 419 365 439 400 449 435 449 470 449 588 357 666 237 666Z"></path></g><rect width="553.6" height="60" x="120" y="220"></rect></g></g></g></svg></mjx-container>时,<mjx-container class="MathJax" jax="SVG" overflow="overflow"><svg style="vertical-align:-.781ex" xmlns="http://www.w3.org/2000/svg" width="4.97ex" height="2.737ex" role="img" focusable="false" viewBox="0 -864.9 2196.6 1209.9"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math" data-latex="\Gamma(\frac{1}{2})=2\int_0^{+\infty}e^{-t^2}dt=\sqrt{\pi}"><g data-mml-node="mi" data-latex="\Gamma"><path data-c="393" d="M274 641 376 641C443 641 487 626 509 596 538 555 541 520 550 450L583 450 554 680 33 680 33 641 61 641C96 641 117 639 124 634 131 629 135 617 135 599L135 81C135 63 131 51 124 46 117 41 96 39 61 39L33 39 33 0C59 2 110 3 187 3 274 3 330 2 356 0L356 39 320 39C267 39 238 44 233 55 231 60 230 69 230 82L230 606C230 641 236 641 274 641Z"></path></g><g data-mml-node="mo" data-latex="(" transform="translate(625,0)"><path data-c="28" d="M318-248C327-248 332-243 332-234 332-231 330-227 327-223 275-183 233-117 202-26 175 53 161 131 161 208L161 292C161 369 175 447 202 526 233 617 275 683 327 723 330 726 332 730 332 734 332 743 327 748 318 748 317 748 314 747 311 745 251 699 201 631 160 540 121 453 101 371 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180C409 129 402 100 396 91 391 86 361 84 306 84L139 84 236 179C304 243 390 312 419 365 439 400 449 435 449 470 449 588 357 666 237 666Z"></path></g></g></g></g><g data-mml-node="mi" data-latex="d" transform="translate(5613.4,0)"><path data-c="1D451" d="M429 632 370 389C349 426 320 445 281 445 216 445 159 412 109 345 63 283 40 218 40 151 40 63 91-11 175-11 218-11 260 12 300 59 311 21 345-11 392-11 461-11 483 71 498 145 498 154 493 159 483 159 474 159 468 152 465 138 445 59 421 19 394 19 377 19 368 33 368 60 368 75 370 91 374 107L516 679 516 683C513 690 507 694 499 694 476 694 434 690 374 683 363 682 357 674 357 660 357 650 366 645 384 645 403 645 429 646 429 632M341 376C351 355 356 341 356 332 355 328 354 323 353 316L304 122C301 111 294 99 285 87 248 42 212 19 177 19 138 19 118 49 118 108 118 132 124 168 136 216 157 301 187 359 224 390 244 407 263 415 282 415 309 415 329 402 341 376Z"></path></g><g data-mml-node="mi" data-latex="t" transform="translate(6133.4,0)"><path data-c="1D461" d="M330 419C330 428 320 433 299 433L218 433C244 537 257 591 257 595 257 616 246 626 225 626 202 626 188 613 182 587L145 433 56 433C34 433 23 432 23 411 23 400 33 395 54 395L135 395C86 200 62 97 62 84 62 28 100-11 156-11 194-11 227 6 256 41 280 70 297 98 308 125 312 136 314 142 314 145 314 154 309 159 299 159 291 159 285 154 281 143 247 60 206 19 157 19 140 19 131 33 131 60 131 75 133 91 137 107L208 395 297 395C323 395 330 397 330 419Z"></path></g></g></g></svg><mjx-break size="4"></mjx-break><svg style="vertical-align:-.566ex" xmlns="http://www.w3.org/2000/svg" width="5.608ex" height="2.46ex" role="img" focusable="false" viewBox="0 -837.5 2478.8 1087.5"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math" data-latex="\Gamma(\frac{1}{2})=2\int_0^{+\infty}e^{-t^2}dt=\sqrt{\pi}"><g data-mml-node="mo" data-latex="="><path data-c="3D" d="M698 367 80 367C64 367 56 359 56 344 56 329 64 321 80 321L698 321C714 321 722 329 722 344 722 356 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333C310 333 348 280 348 173 348 88 317 14 241 14 176 14 128 36 99 80 134 79 160 105 160 139 160 173 135 198 101 198 62 198 42 178 42 137 42 88 64 49 108 18 147-9 193-22 244-22 301-22 350-3 393 34 436 71 457 117 457 173 457 267 383 332 303 353Z"></path></g><g data-mml-node="mo" data-latex=")" transform="translate(1514,0)"><path data-c="29" d="M78-245C138-199 188-131 229-40 268 47 288 129 288 208L288 292C288 371 268 453 229 540 188 631 138 699 78 745 75 747 72 748 71 748 62 748 57 743 57 734 57 730 59 726 62 723 114 683 156 617 187 526 214 447 228 369 228 292L228 208C228 131 214 53 187-26 156-117 114-183 62-223 59-227 57-231 57-234 57-243 62-248 71-248 72-248 75-247 78-245Z"></path></g></g></g></svg><mjx-break size="4"></mjx-break><svg style="vertical-align:-.566ex" xmlns="http://www.w3.org/2000/svg" width="5.814ex" height="2.262ex" role="img" focusable="false" viewBox="0 -750 2569.8 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g 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117 41 96 39 61 39L33 39 33 0C59 2 110 3 187 3 274 3 330 2 356 0L356 39 320 39C267 39 238 44 233 55 231 60 230 69 230 82L230 606C230 641 236 641 274 641Z"></path></g><g data-mml-node="mo" data-latex="(" transform="translate(2180.8,0)"><path data-c="28" d="M318-248C327-248 332-243 332-234 332-231 330-227 327-223 275-183 233-117 202-26 175 53 161 131 161 208L161 292C161 369 175 447 202 526 233 617 275 683 327 723 330 726 332 730 332 734 332 743 327 748 318 748 317 748 314 747 311 745 251 699 201 631 160 540 121 453 101 371 101 292L101 208C101 129 121 47 160-40 201-131 251-199 311-245 314-247 317-248 318-248Z"></path></g><g data-mml-node="mn" data-latex="2" transform="translate(2569.8,0)"><path data-c="32" d="M237 666C186 666 143 648 106 612 69 576 50 534 50 483 50 449 75 424 106 424 136 424 161 450 161 480 161 513 137 536 105 536 102 536 100 536 98 535 117 584 161 627 224 627 306 627 352 556 352 470 352 403 318 331 250 255L62 43C49 28 50 29 50 0L421 0 450 180 417 180C409 129 402 100 396 91 391 86 361 84 306 84L139 84 236 179C304 243 390 312 419 365 439 400 449 435 449 470 449 588 357 666 237 666Z"></path></g><g data-mml-node="mo" data-latex=")" transform="translate(3069.8,0)"><path data-c="29" d="M78-245C138-199 188-131 229-40 268 47 288 129 288 208L288 292C288 371 268 453 229 540 188 631 138 699 78 745 75 747 72 748 71 748 62 748 57 743 57 734 57 730 59 726 62 723 114 683 156 617 187 526 214 447 228 369 228 292L228 208C228 131 214 53 187-26 156-117 114-183 62-223 59-227 57-231 57-234 57-243 62-248 71-248 72-248 75-247 78-245Z"></path></g></g></g></svg><mjx-break size="4"></mjx-break><svg style="vertical-align:-.566ex" xmlns="http://www.w3.org/2000/svg" width="6.945ex" height="2.262ex" role="img" focusable="false" viewBox="0 -750 3069.8 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math" data-latex="\Gamma(3)=\Gamma(3+1)=2\Gamma(2)=2\Gamma(1+1)=2 \cdot1\Gamma(1)=2!"><g data-mml-node="mo" data-latex="="><path data-c="3D" d="M698 367 80 367C64 367 56 359 56 344 56 329 64 321 80 321L698 321C714 321 722 329 722 344 722 356 711 367 698 367M698 179 80 179C64 179 56 171 56 156 56 141 64 133 80 133L698 133C714 133 722 141 722 156 722 169 711 179 698 179Z"></path></g><g data-mml-node="mn" data-latex="2" transform="translate(1055.8,0)"><path data-c="32" d="M237 666C186 666 143 648 106 612 69 576 50 534 50 483 50 449 75 424 106 424 136 424 161 450 161 480 161 513 137 536 105 536 102 536 100 536 98 535 117 584 161 627 224 627 306 627 352 556 352 470 352 403 318 331 250 255L62 43C49 28 50 29 50 0L421 0 450 180 417 180C409 129 402 100 396 91 391 86 361 84 306 84L139 84 236 179C304 243 390 312 419 365 439 400 449 435 449 470 449 588 357 666 237 666Z"></path></g><g data-mml-node="mi" data-latex="\Gamma" transform="translate(1555.8,0)"><path data-c="393" d="M274 641 376 641C443 641 487 626 509 596 538 555 541 520 550 450L583 450 554 680 33 680 33 641 61 641C96 641 117 639 124 634 131 629 135 617 135 599L135 81C135 63 131 51 124 46 117 41 96 39 61 39L33 39 33 0C59 2 110 3 187 3 274 3 330 2 356 0L356 39 320 39C267 39 238 44 233 55 231 60 230 69 230 82L230 606C230 641 236 641 274 641Z"></path></g><g data-mml-node="mo" data-latex="(" transform="translate(2180.8,0)"><path data-c="28" d="M318-248C327-248 332-243 332-234 332-231 330-227 327-223 275-183 233-117 202-26 175 53 161 131 161 208L161 292C161 369 175 447 202 526 233 617 275 683 327 723 330 726 332 730 332 734 332 743 327 748 318 748 317 748 314 747 311 745 251 699 201 631 160 540 121 453 101 371 101 292L101 208C101 129 121 47 160-40 201-131 251-199 311-245 314-247 317-248 318-248Z"></path></g><g data-mml-node="mn" data-latex="1" transform="translate(2569.8,0)"><path data-c="31" d="M269 666C228 624 168 603 89 603L89 564C141 564 184 572 217 588L217 82C217 64 213 52 204 47 195 42 170 39 130 39L95 39 95 0C120 2 174 3 257 3 340 3 394 2 419 0L419 39 384 39C343 39 318 42 310 47 302 52 297 64 297 82L297 636C297 660 295 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384 39C343 39 318 42 310 47 302 52 297 64 297 82L297 636C297 660 295 666 269 666Z"></path></g><g data-mml-node="mo" data-latex=")" transform="translate(1500.2,0)"><path data-c="29" d="M78-245C138-199 188-131 229-40 268 47 288 129 288 208L288 292C288 371 268 453 229 540 188 631 138 699 78 745 75 747 72 748 71 748 62 748 57 743 57 734 57 730 59 726 62 723 114 683 156 617 187 526 214 447 228 369 228 292L228 208C228 131 214 53 187-26 156-117 114-183 62-223 59-227 57-231 57-234 57-243 62-248 71-248 72-248 75-247 78-245Z"></path></g></g></g></svg><mjx-break size="4"></mjx-break><svg style="vertical-align:-.566ex" xmlns="http://www.w3.org/2000/svg" width="3.52ex" height="2.262ex" role="img" focusable="false" viewBox="0 -750 1555.8 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math" data-latex="\Gamma(3)=\Gamma(3+1)=2\Gamma(2)=2\Gamma(1+1)=2 \cdot1\Gamma(1)=2!"><g data-mml-node="mo" data-latex="="><path data-c="3D" d="M698 367 80 367C64 367 56 359 56 344 56 329 64 321 80 321L698 321C714 321 722 329 722 344 722 356 711 367 698 367M698 179 80 179C64 179 56 171 56 156 56 141 64 133 80 133L698 133C714 133 722 141 722 156 722 169 711 179 698 179Z"></path></g><g data-mml-node="mn" data-latex="2" transform="translate(1055.8,0)"><path data-c="32" d="M237 666C186 666 143 648 106 612 69 576 50 534 50 483 50 449 75 424 106 424 136 424 161 450 161 480 161 513 137 536 105 536 102 536 100 536 98 535 117 584 161 627 224 627 306 627 352 556 352 470 352 403 318 331 250 255L62 43C49 28 50 29 50 0L421 0 450 180 417 180C409 129 402 100 396 91 391 86 361 84 306 84L139 84 236 179C304 243 390 312 419 365 439 400 449 435 449 470 449 588 357 666 237 666Z"></path></g></g></g></svg><mjx-break size="3"></mjx-break><svg style="vertical-align:-.566ex" xmlns="http://www.w3.org/2000/svg" width="6.568ex" height="2.262ex" role="img" focusable="false" viewBox="0 -750 2903.2 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math" data-latex="\Gamma(3)=\Gamma(3+1)=2\Gamma(2)=2\Gamma(1+1)=2 \cdot1\Gamma(1)=2!"><g data-mml-node="mo" data-latex="\cdot"><path data-c="22C5" d="M192 250C192 279 168 303 139 303 110 303 86 279 86 250 86 221 110 197 139 197 168 197 192 221 192 250Z"></path></g><g data-mml-node="mn" data-latex="1" transform="translate(500.2,0)"><path data-c="31" d="M269 666C228 624 168 603 89 603L89 564C141 564 184 572 217 588L217 82C217 64 213 52 204 47 195 42 170 39 130 39L95 39 95 0C120 2 174 3 257 3 340 3 394 2 419 0L419 39 384 39C343 39 318 42 310 47 302 52 297 64 297 82L297 636C297 660 295 666 269 666Z"></path></g><g data-mml-node="mi" data-latex="\Gamma" transform="translate(1000.2,0)"><path data-c="393" d="M274 641 376 641C443 641 487 626 509 596 538 555 541 520 550 450L583 450 554 680 33 680 33 641 61 641C96 641 117 639 124 634 131 629 135 617 135 599L135 81C135 63 131 51 124 46 117 41 96 39 61 39L33 39 33 0C59 2 110 3 187 3 274 3 330 2 356 0L356 39 320 39C267 39 238 44 233 55 231 60 230 69 230 82L230 606C230 641 236 641 274 641Z"></path></g><g data-mml-node="mo" data-latex="(" transform="translate(1625.2,0)"><path data-c="28" d="M318-248C327-248 332-243 332-234 332-231 330-227 327-223 275-183 233-117 202-26 175 53 161 131 161 208L161 292C161 369 175 447 202 526 233 617 275 683 327 723 330 726 332 730 332 734 332 743 327 748 318 748 317 748 314 747 311 745 251 699 201 631 160 540 121 453 101 371 101 292L101 208C101 129 121 47 160-40 201-131 251-199 311-245 314-247 317-248 318-248Z"></path></g><g data-mml-node="mn" data-latex="1" transform="translate(2014.2,0)"><path data-c="31" d="M269 666C228 624 168 603 89 603L89 564C141 564 184 572 217 588L217 82C217 64 213 52 204 47 195 42 170 39 130 39L95 39 95 0C120 2 174 3 257 3 340 3 394 2 419 0L419 39 384 39C343 39 318 42 310 47 302 52 297 64 297 82L297 636C297 660 295 666 269 666Z"></path></g><g data-mml-node="mo" data-latex=")" transform="translate(2514.2,0)"><path data-c="29" d="M78-245C138-199 188-131 229-40 268 47 288 129 288 208L288 292C288 371 268 453 229 540 188 631 138 699 78 745 75 747 72 748 71 748 62 748 57 743 57 734 57 730 59 726 62 723 114 683 156 617 187 526 214 447 228 369 228 292L228 208C228 131 214 53 187-26 156-117 114-183 62-223 59-227 57-231 57-234 57-243 62-248 71-248 72-248 75-247 78-245Z"></path></g></g></g></svg><mjx-break size="4"></mjx-break><svg style="vertical-align:-.566ex" xmlns="http://www.w3.org/2000/svg" width="4.149ex" height="2.262ex" role="img" focusable="false" viewBox="0 -750 1833.8 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math" data-latex="\Gamma(3)=\Gamma(3+1)=2\Gamma(2)=2\Gamma(1+1)=2 \cdot1\Gamma(1)=2!"><g data-mml-node="mo" data-latex="="><path data-c="3D" d="M698 367 80 367C64 367 56 359 56 344 56 329 64 321 80 321L698 321C714 321 722 329 722 344 722 356 711 367 698 367M698 179 80 179C64 179 56 171 56 156 56 141 64 133 80 133L698 133C714 133 722 141 722 156 722 169 711 179 698 179Z"></path></g><g data-mml-node="mn" data-latex="2" transform="translate(1055.8,0)"><path data-c="32" d="M237 666C186 666 143 648 106 612 69 576 50 534 50 483 50 449 75 424 106 424 136 424 161 450 161 480 161 513 137 536 105 536 102 536 100 536 98 535 117 584 161 627 224 627 306 627 352 556 352 470 352 403 318 331 250 255L62 43C49 28 50 29 50 0L421 0 450 180 417 180C409 129 402 100 396 91 391 86 361 84 306 84L139 84 236 179C304 243 390 312 419 365 439 400 449 435 449 470 449 588 357 666 237 666Z"></path></g><g data-mml-node="mo" data-latex="!" transform="translate(1555.8,0)"><path data-c="21" d="M139 716C110 716 83 691 86 661L122 211C123 194 129 185 139 185 149 185 155 193 156 210L192 661C195 691 168 716 139 716M192 56C192 87 169 113 139 113 109 113 86 87 86 56 86 26 109 0 139 0 169 0 192 26 192 56Z"></path></g></g></g></svg></mjx-container></p><p>又如：</p><p><mjx-container class="MathJax" jax="SVG" overflow="overflow"><svg style="vertical-align:-.781ex" xmlns="http://www.w3.org/2000/svg" width="4.97ex" height="2.737ex" role="img" focusable="false" viewBox="0 -864.9 2196.6 1209.9"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math" data-latex="\Gamma(\frac{5}{2})=\Gamma(\frac{3}{2}+1)=\frac{3}{2}\Gamma(\frac{3}{2})=\frac{3}{2}\Gamma(\frac{1}{2}+1)=\frac{3}{2}\cdot\frac{1}{2}\Gamma(\frac{1}{2})=\frac{3}{4}\sqrt{\pi}"><g data-mml-node="mi" data-latex="\Gamma"><path data-c="393" d="M274 641 376 641C443 641 487 626 509 596 538 555 541 520 550 450L583 450 554 680 33 680 33 641 61 641C96 641 117 639 124 634 131 629 135 617 135 599L135 81C135 63 131 51 124 46 117 41 96 39 61 39L33 39 33 0C59 2 110 3 187 3 274 3 330 2 356 0L356 39 320 39C267 39 238 44 233 55 231 60 230 69 230 82L230 606C230 641 236 641 274 641Z"></path></g><g data-mml-node="mo" data-latex="(" transform="translate(625,0)"><path data-c="28" d="M318-248C327-248 332-243 332-234 332-231 330-227 327-223 275-183 233-117 202-26 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645 294 634 256 634 211 634 168 643 127 662 122 664 118 665 114 665 105 665 100 656 100 637L100 345C100 324 100 315 118 315Z"></path></g><g data-mml-node="mn" transform="translate(220,-345) scale(0.707)" data-latex="2"><path data-c="32" d="M237 666C186 666 143 648 106 612 69 576 50 534 50 483 50 449 75 424 106 424 136 424 161 450 161 480 161 513 137 536 105 536 102 536 100 536 98 535 117 584 161 627 224 627 306 627 352 556 352 470 352 403 318 331 250 255L62 43C49 28 50 29 50 0L421 0 450 180 417 180C409 129 402 100 396 91 391 86 361 84 306 84L139 84 236 179C304 243 390 312 419 365 439 400 449 435 449 470 449 588 357 666 237 666Z"></path></g><rect width="553.6" height="60" x="120" y="220"></rect></g><g data-mml-node="mo" data-latex=")" transform="translate(1807.6,0)"><path data-c="29" d="M78-245C138-199 188-131 229-40 268 47 288 129 288 208L288 292C288 371 268 453 229 540 188 631 138 699 78 745 75 747 72 748 71 748 62 748 57 743 57 734 57 730 59 726 62 723 114 683 156 617 187 526 214 447 228 369 228 292L228 208C228 131 214 53 187-26 156-117 114-183 62-223 59-227 57-231 57-234 57-243 62-248 71-248 72-248 75-247 78-245Z"></path></g></g></g></svg><mjx-break size="4"></mjx-break><svg style="vertical-align:-.781ex" xmlns="http://www.w3.org/2000/svg" width="6.478ex" height="2.737ex" role="img" focusable="false" viewBox="0 -864.9 2863.3 1209.9"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math" data-latex="\Gamma(\frac{5}{2})=\Gamma(\frac{3}{2}+1)=\frac{3}{2}\Gamma(\frac{3}{2})=\frac{3}{2}\Gamma(\frac{1}{2}+1)=\frac{3}{2}\cdot\frac{1}{2}\Gamma(\frac{1}{2})=\frac{3}{4}\sqrt{\pi}"><g data-mml-node="mo" data-latex="="><path data-c="3D" d="M698 367 80 367C64 367 56 359 56 344 56 329 64 321 80 321L698 321C714 321 722 329 722 344 722 356 711 367 698 367M698 179 80 179C64 179 56 171 56 156 56 141 64 133 80 133L698 133C714 133 722 141 722 156 722 169 711 179 698 179Z"></path></g><g data-mml-node="mi" data-latex="\Gamma" 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focusable="false" viewBox="0 -864.9 4045.9 1209.9"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math" data-latex="\Gamma(\frac{5}{2})=\Gamma(\frac{3}{2}+1)=\frac{3}{2}\Gamma(\frac{3}{2})=\frac{3}{2}\Gamma(\frac{1}{2}+1)=\frac{3}{2}\cdot\frac{1}{2}\Gamma(\frac{1}{2})=\frac{3}{4}\sqrt{\pi}"><g data-mml-node="mo" data-latex="="><path data-c="3D" d="M698 367 80 367C64 367 56 359 56 344 56 329 64 321 80 321L698 321C714 321 722 329 722 344 722 356 711 367 698 367M698 179 80 179C64 179 56 171 56 156 56 141 64 133 80 133L698 133C714 133 722 141 722 156 722 169 711 179 698 179Z"></path></g><g data-mml-node="mfrac" data-latex="\frac{3}{2}" transform="translate(1055.8,0)"><g data-mml-node="mn" transform="translate(220,394) scale(0.707)" data-latex="3"><path data-c="33" d="M303 353C369 378 431 441 431 526 431 569 410 604 369 631 333 654 292 666 246 666 201 666 162 654 127 631 88 605 68 571 68 528 68 495 90 472 122 472 154 472 176 495 176 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627 352 556 352 470 352 403 318 331 250 255L62 43C49 28 50 29 50 0L421 0 450 180 417 180C409 129 402 100 396 91 391 86 361 84 306 84L139 84 236 179C304 243 390 312 419 365 439 400 449 435 449 470 449 588 357 666 237 666Z"></path></g><rect width="553.6" height="60" x="120" y="220"></rect></g><g data-mml-node="mo" data-latex=")" transform="translate(3101.3,0)"><path data-c="29" d="M78-245C138-199 188-131 229-40 268 47 288 129 288 208L288 292C288 371 268 453 229 540 188 631 138 699 78 745 75 747 72 748 71 748 62 748 57 743 57 734 57 730 59 726 62 723 114 683 156 617 187 526 214 447 228 369 228 292L228 208C228 131 214 53 187-26 156-117 114-183 62-223 59-227 57-231 57-234 57-243 62-248 71-248 72-248 75-247 78-245Z"></path></g></g></g></svg><mjx-break size="4"></mjx-break><svg style="vertical-align:-.781ex" xmlns="http://www.w3.org/2000/svg" width="7.403ex" height="2.737ex" role="img" focusable="false" viewBox="0 -864.9 3272.3 1209.9"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math" data-latex="\Gamma(\frac{5}{2})=\Gamma(\frac{3}{2}+1)=\frac{3}{2}\Gamma(\frac{3}{2})=\frac{3}{2}\Gamma(\frac{1}{2}+1)=\frac{3}{2}\cdot\frac{1}{2}\Gamma(\frac{1}{2})=\frac{3}{4}\sqrt{\pi}"><g data-mml-node="mo" data-latex="="><path data-c="3D" d="M698 367 80 367C64 367 56 359 56 344 56 329 64 321 80 321L698 321C714 321 722 329 722 344 722 356 711 367 698 367M698 179 80 179C64 179 56 171 56 156 56 141 64 133 80 133L698 133C714 133 722 141 722 156 722 169 711 179 698 179Z"></path></g><g data-mml-node="mfrac" data-latex="\frac{3}{4}" transform="translate(1055.8,0)"><g data-mml-node="mn" transform="translate(220,394) scale(0.707)" data-latex="3"><path data-c="33" d="M303 353C369 378 431 441 431 526 431 569 410 604 369 631 333 654 292 666 246 666 201 666 162 654 127 631 88 605 68 571 68 528 68 495 90 472 122 472 154 472 176 495 176 527 176 560 157 578 119 580 145 615 186 633 242 633 302 633 332 598 332 527 332 485 324 450 309 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845 40 829 40 820 40 813 36 809 27 666-259 595-403 595-405L595-406C595-413 527-558 390-843L217-461C212-450 207-445 201-445 198-445 192-448 184-454L86-528C77-535 73-540 73-545 73-555 78-560 87-560 90-560 95-557 103-551L151-516 345-943C350-954 357-960 367-960 379-960 387-955 392-946Z"></path></g><g transform="translate(853,0)"><g data-mml-node="mi" data-latex="\pi"><path data-c="1D70B" d="M524 431 194 431C153 431 117 415 88 384 74 369 27 305 27 292 31 285 31 279 43 279 50 279 56 283 62 292 94 341 135 366 184 366L235 366C212 279 170 172 110 45 105 33 102 24 102 19 102-1 113-11 134-11 153-11 167 0 176 21 194 78 207 122 214 152L269 366 372 366C345 247 331 164 331 117 331 68 342-11 379-11 400-11 423 9 423 30 423 35 421 43 417 53 398 100 389 153 389 214 389 261 395 312 406 366L515 366C550 366 567 378 567 403 567 426 549 431 524 431Z"></path></g></g><rect width="570" height="60" x="853" y="717.5"></rect></g></g></g></svg></mjx-container></p><p>数学归纳可得：</p><p><mjx-container class="MathJax" 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\Gamma(n+1)=n!
"><g data-mml-node="mtable" data-latex="
\Gamma(n+1)=n!
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