GHS_indef/bloweybq
MATRIX FOR WHICH EARLY VERSION OF MA57 FAILS
| Name |
bloweybq |
| Group |
GHS_indef |
| Matrix ID |
1425 |
|
Num Rows
|
10,001 |
|
Num Cols
|
10,001 |
|
Nonzeros
|
49,999 |
|
Pattern Entries
|
69,991 |
|
Kind
|
Materials Problem |
|
Symmetric
|
Yes |
|
Date
|
1992 |
|
Author
|
J. Blowey |
|
Editor
|
N. Gould |
| Structural Rank |
10,001 |
| Structural Rank Full |
true |
|
Num Dmperm Blocks
|
1 |
|
Strongly Connect Components
|
1 |
|
Num Explicit Zeros
|
19,992 |
|
Pattern Symmetry
|
100% |
|
Numeric Symmetry
|
100% |
|
Cholesky Candidate
|
yes |
|
Positive Definite
|
yes |
|
Type
|
real |
| SVD Statistics |
| Matrix Norm |
4.999750e+03 |
| Minimum Singular Value |
1.618203e-15 |
| Condition Number |
3.089692e+18
|
| Rank |
9,964 |
| sprank(A)-rank(A) |
37 |
| Null Space Dimension |
37 |
| Full Numerical Rank? |
no |
| Download Singular Values |
MATLAB
|
