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
1239 laser GHS_indef 3,002 3,002 9,000 Materials Problem 2004 MATLAB Rutherford Boeing Matrix Market
1427 qpband GHS_indef 20,000 20,000 45,000 Optimization Problem 1999 MATLAB Rutherford Boeing Matrix Market
1250 tuma2 GHS_indef 12,992 12,992 49,365 2D/3D Problem 2004 MATLAB Rutherford Boeing Matrix Market
1425 bloweybq GHS_indef 10,001 10,001 49,999 Materials Problem 1992 MATLAB Rutherford Boeing Matrix Market
1243 ncvxqp9 GHS_indef 16,554 16,554 54,040 Optimization Problem 1994 MATLAB Rutherford Boeing Matrix Market
1245 sit100 GHS_indef 10,262 10,262 61,046 2D/3D Problem 2004 MATLAB Rutherford Boeing Matrix Market
1234 dtoc GHS_indef 24,993 24,993 69,972 Optimization Problem 1992 MATLAB Rutherford Boeing Matrix Market
1217 aug3d GHS_indef 24,300 24,300 69,984 2D/3D Problem 1994 MATLAB Rutherford Boeing Matrix Market
1242 ncvxqp1 GHS_indef 12,111 12,111 73,963 Optimization Problem 1994 MATLAB Rutherford Boeing Matrix Market
1215 aug2d GHS_indef 29,008 29,008 76,832 2D/3D Problem 1994 MATLAB Rutherford Boeing Matrix Market
1216 aug2dc GHS_indef 30,200 30,200 80,000 2D/3D Problem 1994 MATLAB Rutherford Boeing Matrix Market
1249 tuma1 GHS_indef 22,967 22,967 87,760 2D/3D Problem 2004 MATLAB Rutherford Boeing Matrix Market
1303 linverse GHS_indef 11,999 11,999 95,977 Statistical/Mathematical Problem 1991 MATLAB Rutherford Boeing Matrix Market
1424 bloweybl GHS_indef 30,003 30,003 109,999 Materials Problem 1992 MATLAB Rutherford Boeing Matrix Market
1426 cvxqp3 GHS_indef 17,500 17,500 114,962 Optimization Problem 1995 MATLAB Rutherford Boeing Matrix Market
1218 aug3dcqp GHS_indef 35,543 35,543 128,115 2D/3D Problem 1994 MATLAB Rutherford Boeing Matrix Market
1247 stokes64 GHS_indef 12,546 12,546 140,034 Computational Fluid Dynamics Problem 2004 MATLAB Rutherford Boeing Matrix Market
1248 stokes64s GHS_indef 12,546 12,546 140,034 Computational Fluid Dynamics 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
1299 bratu3d GHS_indef 27,792 27,792 173,796 2D/3D Problem 1989 MATLAB Rutherford Boeing Matrix Market