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ngraph.sparse-collection

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Subset of the University of Florida sparse matrix collection

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# HB/gr_30_30 UF Sparse Matrix Collection, Tim Davis http://www.cise.ufl.edu/research/sparse/matrices/HB/gr_30_30 [SYMMETRIC MATRIX FROM NINE POINT START ON A 30 X 30 GRID.] id: 159 date: 1983 author: R. Grimes ed: I. Duff, R. Grimes, J. Lewis fields: title A name id date author ed kind kind: 2D/3D problem ![HB/gr_30_30](http://yifanhu.net/GALLERY/GRAPHS/GIF_SMALL/HB@gr_30_30.gif)