HB/will57
UNSYMMETRIC PATTERN OF ORDER 57 GIVEN BY WILLOUGHBY IN REID, 1970
| Name |
will57 |
| Group |
HB |
| Matrix ID |
274 |
|
Num Rows
|
57 |
|
Num Cols
|
57 |
|
Nonzeros
|
281 |
|
Pattern Entries
|
281 |
|
Kind
|
Semiconductor Device Problem |
|
Symmetric
|
No |
|
Date
|
1970 |
|
Author
|
R. Willoughby |
|
Editor
|
I. Duff, R. Grimes, J. Lewis |
| Structural Rank |
57 |
| Structural Rank Full |
true |
|
Num Dmperm Blocks
|
1 |
|
Strongly Connect Components
|
1 |
|
Num Explicit Zeros
|
0 |
|
Pattern Symmetry
|
86.6% |
|
Numeric Symmetry
|
86.6% |
|
Cholesky Candidate
|
no |
|
Positive Definite
|
no |
|
Type
|
binary |
| SVD Statistics |
| Matrix Norm |
6.148686e+00 |
| Minimum Singular Value |
2.248575e-17 |
| Condition Number |
2.734481e+17
|
| Rank |
50 |
| sprank(A)-rank(A) |
7 |
| Null Space Dimension |
7 |
| Full Numerical Rank? |
no |
| Download Singular Values |
MATLAB
|
