HB/lshp1270
SYMMETRIC MATRIX FROM ALAN GEORGE'S L-SHAPE PROBLEMS, 1978.
| Name |
lshp1270 |
| Group |
HB |
| Matrix ID |
195 |
|
Num Rows
|
1,270 |
|
Num Cols
|
1,270 |
|
Nonzeros
|
8,668 |
|
Pattern Entries
|
8,668 |
|
Kind
|
Thermal Problem |
|
Symmetric
|
Yes |
|
Date
|
1978 |
|
Author
|
A. George |
|
Editor
|
I. Duff, R. Grimes, J. Lewis |
| Structural Rank |
1,270 |
| Structural Rank Full |
true |
|
Num Dmperm Blocks
|
1 |
|
Strongly Connect Components
|
1 |
|
Num Explicit Zeros
|
0 |
|
Pattern Symmetry
|
100% |
|
Numeric Symmetry
|
100% |
|
Cholesky Candidate
|
yes |
|
Positive Definite
|
no |
|
Type
|
binary |
| SVD Statistics |
| Matrix Norm |
6.975644e+00 |
| Minimum Singular Value |
2.689815e-04 |
| Condition Number |
2.593355e+04
|
| Rank |
1,270 |
| sprank(A)-rank(A) |
0 |
| Null Space Dimension |
0 |
| Full Numerical Rank? |
yes |
| Download Singular Values |
MATLAB
|
