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
1427 qpband GHS_indef 20,000 20,000 45,000 Optimization Problem 1999 MATLAB Rutherford Boeing Matrix Market
1426 cvxqp3 GHS_indef 17,500 17,500 114,962 Optimization Problem 1995 MATLAB Rutherford Boeing Matrix Market
1425 bloweybq GHS_indef 10,001 10,001 49,999 Materials Problem 1992 MATLAB Rutherford Boeing Matrix Market
1424 bloweybl GHS_indef 30,003 30,003 109,999 Materials Problem 1992 MATLAB Rutherford Boeing Matrix Market
1309 spmsrtls GHS_indef 29,995 29,995 229,947 Statistical/Mathematical 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
1307 ncvxqp7 GHS_indef 87,500 87,500 574,962 Optimization Problem 1995 MATLAB Rutherford Boeing Matrix Market
1306 ncvxqp5 GHS_indef 62,500 62,500 424,966 Optimization Problem 1995 MATLAB Rutherford Boeing Matrix Market
1305 ncvxqp3 GHS_indef 75,000 75,000 499,964 Optimization Problem 1995 MATLAB Rutherford Boeing Matrix Market
1304 ncvxbqp1 GHS_indef 50,000 50,000 349,968 Optimization Problem 1995 MATLAB Rutherford Boeing Matrix Market
1303 linverse GHS_indef 11,999 11,999 95,977 Statistical/Mathematical Problem 1991 MATLAB Rutherford Boeing Matrix Market
1302 dixmaanl GHS_indef 60,000 60,000 299,998 Optimization Problem 1989 MATLAB Rutherford Boeing Matrix Market
1301 cont-300 GHS_indef 180,895 180,895 988,195 Optimization Problem 2004 MATLAB Rutherford Boeing Matrix Market
1300 cont-201 GHS_indef 80,595 80,595 438,795 Optimization Problem 2004 MATLAB Rutherford Boeing Matrix Market
1299 bratu3d GHS_indef 27,792 27,792 173,796 2D/3D Problem 1989 MATLAB Rutherford Boeing Matrix Market
1298 brainpc2 GHS_indef 27,607 27,607 179,395 Optimization Problem 1994 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
1295 bloweya GHS_indef 30,004 30,004 150,009 Materials Problem 1992 MATLAB Rutherford Boeing Matrix Market
1294 blockqp1 GHS_indef 60,012 60,012 640,033 Optimization Problem 1994 MATLAB Rutherford Boeing Matrix Market