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Sparse Matrix @sparsematrix.bsky.social · 3h

Oberwolfach: microhotplate gas sensor Size: 66917x66917 Nonzeros: 1703365 Kind: Model Reduction Problem Author: J. Hildenbrand Date: 2004 Link: sparse.tamu.edu/Oberwolfach/gas_sen…

Sparse Matrix of size 66917x66917 by J. Hildenbrand.

000

Sparse Matrix @sparsematrix.bsky.social · 9h

UNSYMMETRIC MATRIX FROM GRENOBLE,FRANCOIS CACHARD,MARCH 1981. Size: 216x216 Nonzeros: 812 Kind: Directed Weighted Graph Author: F. Cachard Date: 1981 Link: sparse.tamu.edu/HB/gre_216b

Sparse Matrix of size 216x216 by F. Cachard.

000

Sparse Matrix @sparsematrix.bsky.social · 15h

lowThrust optimal control problem (matrix 8 of 13) Size: 17702x17702 Nonzeros: 216445 Kind: Optimal Control Problem Author: B. Senses, A. Rao Date: 2015 Link: sparse.tamu.edu/VDOL/lowThrust_8

Sparse Matrix of size 17702x17702 by B. Senses, A. Rao.

000

Sparse Matrix @sparsematrix.bsky.social · 21h

New England Power System (CEPEL, Brazil) Size: 66x66 Nonzeros: 1194 Kind: Eigenvalue/Model Reduction Problem Author: N. Martins Date: 2010 Link: sparse.tamu.edu/Rommes/ww_36_pmec_36

Sparse Matrix of size 66x66 by N. Martins.

000

Sparse Matrix @sparsematrix.bsky.social · 03/10/2026

DIMACS10 set: clustering/chesapeake Size: 39x39 Nonzeros: 340 Kind: Undirected Graph Author: unknown Date: 2011 Link: sparse.tamu.edu/DIMACS10/chesapeake

000

Sparse Matrix @sparsematrix.bsky.social · 03/10/2026

UNSYMMETRIC FACSIMILE CONVERGENCE MATRIX Size: 680x680 Nonzeros: 2424 Kind: Subsequent 2D/3D Problem Author: A. Curtis Date: 1983 Link: sparse.tamu.edu/HB/fs_680_2

Sparse Matrix of size 680x680 by A. Curtis.

000

Sparse Matrix @sparsematrix.bsky.social · 02/10/2026

PWT: Nasa matrix, but with a diagonal added to the original matrix Size: 36519x36519 Nonzeros: 326107 Kind: Duplicate Structural Problem Author: NASA Date: 1995 Link: sparse.tamu.edu/Nasa/pwt

Sparse Matrix of size 36519x36519 by NASA.

010

Sparse Matrix @sparsematrix.bsky.social · 02/10/2026

DIMACS10 set: random/rgg_n_2_15_s0 Size: 32768x32768 Nonzeros: 320480 Kind: Undirected Random Graph Author: M. Holtgrewe, P. Sanders, C. Schulz Date: 2011 Link: sparse.tamu.edu/DIMACS10/rgg_n_2_15…

Sparse Matrix of size 32768x32768 by M. Holtgrewe, P. Sanders, C. Schulz.

000

Sparse Matrix @sparsematrix.bsky.social · 02/10/2026

SYMMETRIC CONNECTION TABLE FROM DTNSRDC, WASHINGTON Size: 346x346 Nonzeros: 3226 Kind: Structural Problem Author: G. Everstine, D. Taylor Date: 1980 Link: sparse.tamu.edu/HB/dwt_346

Sparse Matrix of size 346x346 by G. Everstine, D. Taylor.

000

Sparse Matrix @sparsematrix.bsky.social · 02/10/2026

machine learning graph: iris_dataset_30NN Size: 150x150 Nonzeros: 5518 Kind: Undirected Weighted Graph Author: D. Pasadakis, C.L. Alappat, O. Schenk, G. Wellein Date: 2020 Link: sparse.tamu.edu/ML_Graph/iris_datas…

Sparse Matrix of size 150x150 by D. Pasadakis, C.L. Alappat, O. Schenk, G. Wellein.

010

Sparse Matrix @sparsematrix.bsky.social · 01/10/2026

Gould, Hu, & Scott: expanded system-3D PDE (CUTEr) Size: 24300x24300 Nonzeros: 69984 Kind: 2D/3D Problem Author: N. Gould Date: 1994 Link: sparse.tamu.edu/GHS_indef/aug3d

Sparse Matrix of size 24300x24300 by N. Gould.

000

Sparse Matrix @sparsematrix.bsky.social · 01/10/2026

Rajat/rajat12 circuit simulation matrix Size: 1879x1879 Nonzeros: 12818 Kind: Circuit Simulation Problem Author: Rajat Date: 2004 Link: sparse.tamu.edu/Rajat/rajat12

Sparse Matrix of size 1879x1879 by Rajat.

000

Sparse Matrix @sparsematrix.bsky.social · 01/10/2026

Netlib LP problem stocfor2: minimize c'*x, where Ax=b, lo<=x<=hi Size: 2157x3045 Nonzeros: 9357 Kind: Linear Programming Problem Author: G. Gassmann Date: 1988 Link: sparse.tamu.edu/LPnetlib/lp_stocfor2

Sparse Matrix of size 2157x3045 by G. Gassmann.

000

Sparse Matrix @sparsematrix.bsky.social · 01/10/2026

Oberwolfach: convective thermal flow Size: 9669x9669 Nonzeros: 67391 Kind: Model Reduction Problem Author: C. Moosmann, A. Griener Date: 2004 Link: sparse.tamu.edu/Oberwolfach/flowmet…

Sparse Matrix of size 9669x9669 by C. Moosmann, A. Griener.

000

Sparse Matrix @sparsematrix.bsky.social · 30/09/2026

Wikipedia pages, A(i,j)=1 if page i links to page j (Nov 4, 2006) Size: 3148440x3148440 Nonzeros: 39383235 Kind: Directed Graph Author: D. Gleich Date: 2006 Link: sparse.tamu.edu/Gleich/wikipedia-20…

Sparse Matrix of size 3148440x3148440 by D. Gleich.

000

Sparse Matrix @sparsematrix.bsky.social · 30/09/2026

Combinatorial optimization as polynomial eqns, Susan Margulies, UC Davis Size: 625x513 Nonzeros: 1538 Kind: Combinatorial Problem Author: S. Margulies Date: 2008 Link: sparse.tamu.edu/JGD_Margulies/flowe…

Sparse Matrix of size 625x513 by S. Margulies.

000

Sparse Matrix @sparsematrix.bsky.social · 30/09/2026

Random matrix, nodes 1..n descreasing average degree.G37=pattern of G41 Size: 2000x2000 Nonzeros: 23570 Kind: Duplicate Undirected Random Graph Author: C. Helmberg Date: 1996 Link: sparse.tamu.edu/Gset/G37

Sparse Matrix of size 2000x2000 by C. Helmberg.

000

Sparse Matrix @sparsematrix.bsky.social · 30/09/2026

Random matrix, nodes 1..n descreasing average degree.G58=pattern of G59 Size: 5000x5000 Nonzeros: 59140 Kind: Duplicate Undirected Random Graph Author: C. Helmberg Date: 1996 Link: sparse.tamu.edu/Gset/G58

Sparse Matrix of size 5000x5000 by C. Helmberg.

000

Sparse Matrix @sparsematrix.bsky.social · 29/09/2026

linear programming problem, C. Meszaros test set Size: 4050x61521 Nonzeros: 264627 Kind: Linear Programming Problem Author: N/A Date: 2004 Link: sparse.tamu.edu/Meszaros/rlfddd

Sparse Matrix of size 4050x61521 by N/A.

000

Sparse Matrix @sparsematrix.bsky.social · 29/09/2026

DIMACS10 set: redistrict/ca2010 and ca2010a Size: 710145x710145 Nonzeros: 3489366 Kind: Undirected Weighted Graph Author: W. Zhao Date: 2010 Link: sparse.tamu.edu/DIMACS10/ca2010

Sparse Matrix of size 710145x710145 by W. Zhao.

001

Sparse Matrix @sparsematrix.bsky.social · 29/09/2026

freeFlyingRobot optimal control problem (matrix 15 of 16) Size: 6038x6038 Nonzeros: 43378 Kind: Optimal Control Problem Author: B. Senses, A. Rao Date: 2015 Link: sparse.tamu.edu/VDOL/freeFlyingRobo…

Sparse Matrix of size 6038x6038 by B. Senses, A. Rao.

000

Sparse Matrix @sparsematrix.bsky.social · 28/09/2026

UNSYMMETRIC - 3D STEAM MODEL OF OIL RES. - 4 X 4 X 5 - 3 DOF MAY 1983 Size: 240x240 Nonzeros: 2248 Kind: Computational Fluid Dynamics Problem Author: R. Grimes Date: 1983 Link: sparse.tamu.edu/HB/steam1

Sparse Matrix of size 240x240 by R. Grimes.

020

Sparse Matrix @sparsematrix.bsky.social · 28/09/2026

webbase: Web connectivity matrix. Williams et al. Size: 1000005x1000005 Nonzeros: 3105536 Kind: Weighted Directed Graph Author: unknown Date: 2008 Link: sparse.tamu.edu/Williams/webbase-1M

Sparse Matrix of size 1000005x1000005 by unknown.

022

Sparse Matrix @sparsematrix.bsky.social · 28/09/2026

Finite element, Navier-Stokes & other transport eqns Size: 100037x100037 Nonzeros: 3226066 Kind: Computational Fluid Dynamics Author: R. Goodwin Date: 2018 Link: sparse.tamu.edu/Goodwin/Goodwin_095

Sparse Matrix of size 100037x100037 by R. Goodwin.

000

Sparse Matrix @sparsematrix.bsky.social · 27/09/2026

Sandia/adder_dcop_56 circuit simulation matrix. Sandia National Lab. Size: 1813x1813 Nonzeros: 11246 Kind: Subsequent Circuit Simulation Problem Author: R. Hoekstra Date: 2003 Link: sparse.tamu.edu/Sandia/adder_dcop_56

Sparse Matrix of size 1813x1813 by R. Hoekstra.

000

Sparse Matrix @sparsematrix.bsky.social · 27/09/2026

Deterministic equiv. of stochastic linear programming problem Size: 6095x17313 Nonzeros: 35731 Kind: Linear Programming Problem Author: N/A Date: 2004 Link: sparse.tamu.edu/Meszaros/deter2

Sparse Matrix of size 6095x17313 by N/A.

000

Sparse Matrix @sparsematrix.bsky.social · 26/09/2026

Simplicial complexes from Homology from Volkmar Welker. Size: 20058x5970 Nonzeros: 100290 Kind: Combinatorial Problem Author: V. Welker Date: 2008 Link: sparse.tamu.edu/JGD_Homology/cis-n4…

Sparse Matrix of size 20058x5970 by V. Welker.

000

Sparse Matrix @sparsematrix.bsky.social · 26/09/2026

transient optimal power flow, Full-Space. Guangchao Geng, Zhejiang Univ Size: 28216x28216 Nonzeros: 730080 Kind: Power Network Problem Author: G. Geng Date: 2009 Link: sparse.tamu.edu/TSOPF/TSOPF_FS_b39_…

Sparse Matrix of size 28216x28216 by G. Geng.

000

Sparse Matrix @sparsematrix.bsky.social · 26/09/2026

U RIGOROUS FLASH UNIT ( CHEM. ENG. FROM A. WESTERBERG ) Size: 132x132 Nonzeros: 413 Kind: Chemical Process Simulation Problem Author: A. Westerberg Date: 1983 Link: sparse.tamu.edu/HB/west0132

Sparse Matrix of size 132x132 by A. Westerberg.

000

Sparse Matrix @sparsematrix.bsky.social · 26/09/2026

net50 matrix from Alexander Andrianov, SAS Institute Inc. Size: 16320x16320 Nonzeros: 945200 Kind: Optimization Problem Author: A. Andrianov Date: 2006 Link: sparse.tamu.edu/Andrianov/net50

Sparse Matrix of size 16320x16320 by A. Andrianov.

011

Sparse Matrix @sparsematrix.bsky.social · 25/09/2026

lowThrust optimal control problem (matrix 9 of 13) Size: 18044x18044 Nonzeros: 219589 Kind: Optimal Control Problem Author: B. Senses, A. Rao Date: 2015 Link: sparse.tamu.edu/VDOL/lowThrust_9

Sparse Matrix of size 18044x18044 by B. Senses, A. Rao.

000

Sparse Matrix @sparsematrix.bsky.social · 25/09/2026

DIMACS10 set: star-mixtures/vsp_bcsstk30_500sep_10in_1Kout Size: 58348x58348 Nonzeros: 4033156 Kind: Random Unweighted Graph Author: C. Schultz Date: 2011 Link: sparse.tamu.edu/DIMACS10/vsp_bcsstk…

Sparse Matrix of size 58348x58348 by C. Schultz.

000

Sparse Matrix @sparsematrix.bsky.social · 25/09/2026

machine learning graph: kmnist_norm_10NN Size: 10000x10000 Nonzeros: 156932 Kind: Undirected Weighted Graph Author: D. Pasadakis, C.L. Alappat, O. Schenk, G. Wellein Date: 2020 Link: sparse.tamu.edu/ML_Graph/kmnist_nor…

Sparse Matrix of size 10000x10000 by D. Pasadakis, C.L. Alappat, O. Schenk, G. Wellein.

000

Sparse Matrix @sparsematrix.bsky.social · 25/09/2026

2002 web crawl of .uk domain Size: 18520486x18520486 Nonzeros: 298113762 Kind: Directed Graph Author: Laboratory for Web Algorithmics (LAW), Universita degli Studi di Milano, law.di.unimi.it/index.php Date: 2002 Link: sparse.tamu.edu/LAW/uk-2002

Sparse Matrix of size 18520486x18520486 by Laboratory for Web Algorithmics (LAW), Universita degli Studi di Milano, http://law.di.unimi.it/index.php.

000

Sparse Matrix @sparsematrix.bsky.social · 24/09/2026

IBM TJ Watson, non-linear optimization Size: 4598x4598 Nonzeros: 30590 Kind: Optimization Problem Author: IBM Date: 2006 Link: sparse.tamu.edu/Schenk_IBMNA/c-28

000

Sparse Matrix @sparsematrix.bsky.social · 24/09/2026

S AIR-TRAFFIC CONTROL MODEL BY STAVROS A. ZENIOS Size: 2873x2873 Nonzeros: 1314 Kind: Optimization Problem Author: S. Zenios Date: 1985 Link: sparse.tamu.edu/HB/zenios

Sparse Matrix of size 2873x2873 by S. Zenios.

000

Sparse Matrix @sparsematrix.bsky.social · 24/09/2026

Power simulation matrix, Li Peijie, Inst. of Power Systems, Guangxi Univ. Size: 8140x8140 Nonzeros: 2012833 Kind: Power Network Problem Author: L. Peijie Date: 2011 Link: sparse.tamu.edu/IPSO/TSC_OPF_1047

Sparse Matrix of size 8140x8140 by L. Peijie.

000

Sparse Matrix @sparsematrix.bsky.social · 23/09/2026

Netlib LP problem bore3d: minimize c'*x, where Ax=b, lo<=x<=hi Size: 233x334 Nonzeros: 1448 Kind: Linear Programming Problem Author: R. Fourer Date: N/A Link: sparse.tamu.edu/LPnetlib/lp_bore3d

Sparse Matrix of size 233x334 by R. Fourer.

000

Sparse Matrix @sparsematrix.bsky.social · 23/09/2026

Simplicial complexes from Homology from Volkmar Welker. Size: 4935x6435 Nonzeros: 44415 Kind: Combinatorial Problem Author: V. Welker Date: 2008 Link: sparse.tamu.edu/JGD_Homology/n3c6-b8

Sparse Matrix of size 4935x6435 by V. Welker.

000

Sparse Matrix @sparsematrix.bsky.social · 23/09/2026

DNA electrophoresis, 5 monomers in polymer. A. van Heukelum, Utrecht U. Size: 37x37 Nonzeros: 233 Kind: Directed Weighted Graph Author: A. van Heukelum Date: 2003 Link: sparse.tamu.edu/vanHeukelum/cage5

Sparse Matrix of size 37x37 by A. van Heukelum.

010

Sparse Matrix @sparsematrix.bsky.social · 23/09/2026

Tube problem from R. Kouhia Size: 21498x21498 Nonzeros: 897056 Kind: Structural Problem Author: R. Kouhia Date: 2008 Link: sparse.tamu.edu/TKK/tube2

Sparse Matrix of size 21498x21498 by R. Kouhia.

000

Sparse Matrix @sparsematrix.bsky.social · 22/09/2026

linear programming problem, C. Meszaros test set Size: 400x1200 Nonzeros: 152800 Kind: Linear Programming Problem Author: N/A Date: 2004 Link: sparse.tamu.edu/Meszaros/cari

000

Sparse Matrix @sparsematrix.bsky.social · 22/09/2026

Wei Shyy, Univ. Florida. CFD/Navier-Stokes,viscous flow, fully coupled Size: 4720x4720 Nonzeros: 20042 Kind: Computational Fluid Dynamics Problem Author: W. Shyy Date: 1994 Link: sparse.tamu.edu/Shyy/shyy41

Sparse Matrix of size 4720x4720 by W. Shyy.

000

Sparse Matrix @sparsematrix.bsky.social · 22/09/2026

Infeasible linear programming problem, C. Meszaros test set Size: 714x1071 Nonzeros: 2607 Kind: Linear Programming Problem Author: N/A Date: 2004 Link: sparse.tamu.edu/Meszaros/gams60am

000

Sparse Matrix @sparsematrix.bsky.social · 22/09/2026

linear programming problem, C. Meszaros test set Size: 1023x1408 Nonzeros: 46463 Kind: Linear Programming Problem Author: N/A Date: 2004 Link: sparse.tamu.edu/Meszaros/complex

000

Sparse Matrix @sparsematrix.bsky.social · 21/09/2026

DIMACS10 set: star-mixtures/vsp_south31_slptsk Size: 39668x39668 Nonzeros: 379828 Kind: Random Unweighted Graph Author: C. Schultz Date: 2011 Link: sparse.tamu.edu/DIMACS10/vsp_south3…

Sparse Matrix of size 39668x39668 by C. Schultz.

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Sparse Matrix @sparsematrix.bsky.social · 21/09/2026

PLATZMAN SKEW-SYMMETRIC FINITE DIFFERENCE THREE OCEAN MODEL Size: 1919x1919 Nonzeros: 9662 Kind: 2D/3D Problem Author: J. Lewis Date: 1975 Link: sparse.tamu.edu/HB/plsk1919

Sparse Matrix of size 1919x1919 by J. Lewis.

000

Sparse Matrix @sparsematrix.bsky.social · 21/09/2026

MATRIX FOR WHICH EARLY VERSION OF MA57 FAILS Size: 10001x10001 Nonzeros: 49999 Kind: Materials Problem Author: J. Blowey Date: 1992 Link: sparse.tamu.edu/GHS_indef/bloweybq

Sparse Matrix of size 10001x10001 by J. Blowey.

000

Sparse Matrix @sparsematrix.bsky.social · 21/09/2026

SPD matrix (finite difference 3D) from APACHE small Size: 715176x715176 Nonzeros: 4817870 Kind: Structural Problem Author: N/A Date: 2006 Link: sparse.tamu.edu/GHS_psdef/apache2

Sparse Matrix of size 715176x715176 by N/A.

000

Sparse Matrix @sparsematrix.bsky.social · 20/09/2026

Sandia/adder_dcop_65 circuit simulation matrix. Sandia National Lab. Size: 1813x1813 Nonzeros: 11246 Kind: Subsequent Circuit Simulation Problem Author: R. Hoekstra Date: 2003 Link: sparse.tamu.edu/Sandia/adder_dcop_65

000