GHS_indef/helm3d01

Helmholtz eq. on a unit cube: -div grad u -10000 u = 1, B.C. u = 0
Name helm3d01
Group GHS_indef
Matrix ID 1237
Num Rows 32,226
Num Cols 32,226
Nonzeros 428,444
Pattern Entries 428,444
Kind 2D/3D Problem
Symmetric Yes
Date 2004
Author
Editor N. Gould, Y. Hu, J. Scott
Structural Rank 32,226
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 5.052177e-01
Minimum Singular Value 2.060517e-06
Condition Number 2.451897e+05
Rank 32,226
sprank(A)-rank(A) 0
Null Space Dimension 0
Full Numerical Rank? yes
Download Singular Values MATLAB