HB/lap_25
FINITE ELEMENT PROBLEM. LAPLACIAN ON A 5 BY 5 GRID.
| Name |
lap_25 |
| Group |
HB |
| Matrix ID |
1177 |
|
Num Rows
|
25 |
|
Num Cols
|
25 |
|
Nonzeros
|
169 |
|
Pattern Entries
|
169 |
|
Kind
|
Structural Problem |
|
Symmetric
|
Yes |
|
Date
|
1980 |
|
Author
|
I. Duff |
|
Editor
|
I. Duff, R. Grimes, J. Lewis |
| Structural Rank |
25 |
| 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 |
7.464102e+00 |
| Minimum Singular Value |
5.261265e-17 |
| Condition Number |
1.418690e+17
|
| Rank |
16 |
| sprank(A)-rank(A) |
9 |
| Null Space Dimension |
9 |
| Full Numerical Rank? |
no |
| Download Singular Values |
MATLAB
|
