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).

--------------------------------------------------------------------------------

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                          

--------------------------------------------------------------------------------

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

--------------------------------------------------------------------------------

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
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
1217 aug3d GHS_indef 24,300 24,300 69,984 2D/3D Problem 1994 MATLAB Rutherford Boeing Matrix Market
1218 aug3dcqp GHS_indef 35,543 35,543 128,115 2D/3D Problem 1994 MATLAB Rutherford Boeing Matrix Market
1219 bmw3_2 GHS_indef 227,362 227,362 11,288,630 Structural Problem 2004 MATLAB Rutherford Boeing Matrix Market
1220 c-55 GHS_indef 32,780 32,780 403,450 Optimization Problem 2004 MATLAB Rutherford Boeing Matrix Market
1221 c-58 GHS_indef 37,595 37,595 552,551 Optimization Problem 2004 MATLAB Rutherford Boeing Matrix Market
1222 c-59 GHS_indef 41,282 41,282 480,536 Optimization Problem 2004 MATLAB Rutherford Boeing Matrix Market
1223 c-62ghs GHS_indef 41,731 41,731 559,339 Subsequent Optimization Problem 2004 MATLAB Rutherford Boeing Matrix Market
1224 c-63 GHS_indef 44,234 44,234 434,704 Optimization Problem 2004 MATLAB Rutherford Boeing Matrix Market
1225 c-68 GHS_indef 64,810 64,810 565,996 Optimization Problem 2004 MATLAB Rutherford Boeing Matrix Market
1226 c-69 GHS_indef 67,458 67,458 623,914 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
1228 c-71 GHS_indef 76,638 76,638 859,520 Optimization 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
1230 copter2 GHS_indef 55,476 55,476 759,952 Computational Fluid Dynamics 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
1232 darcy003 GHS_indef 389,874 389,874 2,097,566 2D/3D Problem 2002 MATLAB Rutherford Boeing Matrix Market
1233 dawson5 GHS_indef 51,537 51,537 1,010,777 Structural 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