GHS_indef/c-55
Schenk: IBM TJ Watson, Yorktown, nonlinear optimization
Name |
c-55 |
Group |
GHS_indef |
Matrix ID |
1220 |
Num Rows
|
32,780 |
Num Cols
|
32,780 |
Nonzeros
|
403,450 |
Pattern Entries
|
403,450 |
Kind
|
Optimization Problem |
Symmetric
|
Yes |
Date
|
2004 |
Author
|
IBM |
Editor
|
O. Schenk |
Structural Rank |
32,780 |
Structural Rank Full |
true |
Num Dmperm Blocks
|
1 |
Strongly Connect Components
|
1 |
Num Explicit Zeros
|
0 |
Pattern Symmetry
|
100% |
Numeric Symmetry
|
100% |
Cholesky Candidate
|
no |
Positive Definite
|
no |
Type
|
real |
SVD Statistics |
Matrix Norm |
9.404468e+04 |
Minimum Singular Value |
1.982253e-04 |
Condition Number |
4.744334e+08
|
Rank |
32,780 |
sprank(A)-rank(A) |
0 |
Null Space Dimension |
0 |
Full Numerical Rank? |
yes |
Download Singular Values |
MATLAB
|
Download |
MATLAB
Rutherford Boeing
Matrix Market
|
Notes |
Revised Nov 2006; relative eps changes to A, right-hand-side added.
Note that this matrix should have been placed in the Schenk_IBMNA/
directory when it was first added in August 2004, but moving it now
would disrupt exising users of the collection.
|