Group GHS_indef

Group Description 
Indefinite matrices collected by Nick Gould, Yifan Hu, and Jennifer Scott.

The GHS_indef and GHS_psdef collection includes matrices from the Matrix
Market (math.nist.gov/MatrixMarket), Rutherford-Boeing collection (Duff,
Grimes, and Lewis), the Parasol project (see below), Kumfert and Pothen,
CUTE/CUTEr optimization test set, the UF sparse matrix collection
(those are excluded here), Andy Wathen, Mario Arioli, Christian Damhaug,
Alison Ramage, Anshul Gupta (Gupta's matrices are in the UF collection
under the Gupta directory), Olaf Schenk (matrices from Olaf Schenk are
located here, as well as in the existing Schenk_* directories),
Miroslav Tuma, Maros and Meszaros, and the Dept. of Mathematical
Modelling in DIAMO (Czech Republic).

See ftp://ftp.numerical.rl.ac.uk/pub/matrices/symmetric/ for the
GHS collection.

NOTE: matrices can have upper-case or lower case matrix-type fields
(rsa or RSA, for example).

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bms3_2 matrix:
Source:   www.parallab.uib.no/parasol/data.html  (matrix BMW3_2)
Linear static analysis of a car body. Indefinite matrix.
              (MSC-CARBODY-220K)
Order         227362    
No. entries  5757996                          

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Matrices form Olaf Schenk:  see the description in the Schenk_IBMNA
directory, for the c-55 to c-72 matrices.

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SIT100, K1_SAN, OLESNIKO, D_PRETOK, and TURON_M are from the Dept. of
Mathematical Modelling in DIAMO, s.e., Straz pod Ralskem, Czech Republic.
They represent fluid flow in porous media.
Displaying collection matrices 1 - 20 of 60 in total
Id Name Group Rows Cols Nonzeros Kind Date Download File
1219 bmw3_2 GHS_indef 227,362 227,362 11,288,630 Structural Problem 2004 MATLAB Rutherford Boeing Matrix Market
1236 helm2d03 GHS_indef 392,257 392,257 2,741,935 2D/3D Problem 2004 MATLAB Rutherford Boeing Matrix Market
1235 exdata_1 GHS_indef 6,001 6,001 2,269,500 Optimization Problem 2004 MATLAB Rutherford Boeing Matrix Market
1241 mario002 GHS_indef 389,874 389,874 2,097,566 Duplicate 2D/3D Problem 2004 MATLAB Rutherford Boeing Matrix Market
1232 darcy003 GHS_indef 389,874 389,874 2,097,566 2D/3D Problem 2002 MATLAB Rutherford Boeing Matrix Market
1251 turon_m GHS_indef 189,924 189,924 1,690,876 2D/3D Problem 2004 MATLAB Rutherford Boeing Matrix Market
1231 d_pretok GHS_indef 182,730 182,730 1,641,672 2D/3D Problem 2004 MATLAB Rutherford Boeing Matrix Market
1308 sparsine GHS_indef 50,000 50,000 1,548,988 Structural Problem 1995 MATLAB Rutherford Boeing Matrix Market
1297 boyd2 GHS_indef 466,316 466,316 1,500,397 Optimization Problem 2004 MATLAB Rutherford Boeing Matrix Market
1296 boyd1 GHS_indef 93,279 93,279 1,211,231 Optimization Problem 2004 MATLAB Rutherford Boeing Matrix Market
1233 dawson5 GHS_indef 51,537 51,537 1,010,777 Structural Problem 2004 MATLAB Rutherford Boeing Matrix Market
1301 cont-300 GHS_indef 180,895 180,895 988,195 Optimization Problem 2004 MATLAB Rutherford Boeing Matrix Market
1228 c-71 GHS_indef 76,638 76,638 859,520 Optimization Problem 2004 MATLAB Rutherford Boeing Matrix Market
1230 copter2 GHS_indef 55,476 55,476 759,952 Computational Fluid Dynamics Problem 2004 MATLAB Rutherford Boeing Matrix Market
1244 olesnik0 GHS_indef 88,263 88,263 744,216 2D/3D Problem 2004 MATLAB Rutherford Boeing Matrix Market
1229 c-72 GHS_indef 84,064 84,064 707,546 Optimization Problem 2004 MATLAB Rutherford Boeing Matrix Market
1227 c-70 GHS_indef 68,924 68,924 658,986 Optimization Problem 2004 MATLAB Rutherford Boeing Matrix Market
1294 blockqp1 GHS_indef 60,012 60,012 640,033 Optimization Problem 1994 MATLAB Rutherford Boeing Matrix Market
1226 c-69 GHS_indef 67,458 67,458 623,914 Optimization Problem 2004 MATLAB Rutherford Boeing Matrix Market
1307 ncvxqp7 GHS_indef 87,500 87,500 574,962 Optimization Problem 1995 MATLAB Rutherford Boeing Matrix Market