GHS_psdef/torsion1
Gould, Hu, & Scott: optimization problem (CUTEr)
| Name |
torsion1 |
| Group |
GHS_psdef |
| Matrix ID |
1315 |
|
Num Rows
|
40,000 |
|
Num Cols
|
40,000 |
|
Nonzeros
|
197,608 |
|
Pattern Entries
|
197,608 |
|
Kind
|
Duplicate Optimization Problem |
|
Symmetric
|
Yes |
|
Date
|
1983 |
|
Author
|
R. Dembo, U. Tulowitzki |
|
Editor
|
P. Toint |
| Structural Rank |
40,000 |
| Structural Rank Full |
true |
|
Num Dmperm Blocks
|
5 |
|
Strongly Connect Components
|
5 |
|
Num Explicit Zeros
|
0 |
|
Pattern Symmetry
|
100% |
|
Numeric Symmetry
|
100% |
|
Cholesky Candidate
|
yes |
|
Positive Definite
|
yes |
|
Type
|
real |
| SVD Statistics |
| Matrix Norm |
8.199498e+00 |
| Minimum Singular Value |
2.000000e-01 |
| Condition Number |
4.099749e+01
|
| Rank |
40,000 |
| sprank(A)-rank(A) |
0 |
| Null Space Dimension |
0 |
| Full Numerical Rank? |
yes |
| Download Singular Values |
MATLAB
|
