AG-Monien/airfoil1
2D finite element problem
| Name |
airfoil1 |
| Group |
AG-Monien |
| Matrix ID |
2411 |
|
Num Rows
|
4,253 |
|
Num Cols
|
4,253 |
|
Nonzeros
|
24,578 |
|
Pattern Entries
|
24,578 |
|
Kind
|
2D/3D Problem |
|
Symmetric
|
Yes |
|
Date
|
1998 |
|
Author
|
R. Diekmann, R. Preis |
|
Editor
|
R. Diekmann, R. Preis |
| Structural Rank |
4,253 |
| 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
|
binary |
| SVD Statistics |
| Matrix Norm |
6.029395e+00 |
| Minimum Singular Value |
2.010029e-04 |
| Condition Number |
2.999656e+04
|
| Rank |
4,253 |
| sprank(A)-rank(A) |
0 |
| Null Space Dimension |
0 |
| Full Numerical Rank? |
yes |
| Download Singular Values |
MATLAB
|
| Download |
MATLAB
Rutherford Boeing
Matrix Market
|
| Notes |
AG-Monien Graph Collection, Ralf Diekmann and Robert Preis
http://www2.cs.uni-paderborn.de/fachbereich/AG/monien/RESEARCH/PART/graphs.html
A collection of test graphs from various sources. Many of the graphs
include XY or XYZ coordinates. This set also includes some graphs from
the Harwell-Boeing collection, the NASA matrices, and some random matrices
which are not included here in the AG-Monien/ group of the UF Collection.
In addition, two graphs already appear in other groups:
AG-Monien/big : same as Nasa/barth5, Pothen/barth5 (not included here)
AG-Monien/cage_3_11 : same as Pajek/GD98_c (included here)
The AG-Monien/GRID subset is not included. It contains square grids that
are already well-represented in the UF Collection.
Six of the problem sets are included as sequences, each sequence being
a single problem instance in the UF Collection:
bfly: 10 butterfly graphs 3..12
cage: 45 cage graphs 3..12
cca: 10 cube-connected cycle graphs, no wrap
ccc: 10 cube-connected cycle graphs, with wrap
debr: 18 De Bruijn graphs
se: 13 shuffle-exchange graphs
Problem.aux.G{:} are the graphs in these 6 sequences. Problem.aux.Gname{:}
are the original names of each graph, and Problemm.aux.Gcoord{:} are the
xy or xyz coordinates of each node, if present.
|
