Matrix properties
number of rows	7,500
number of columns	7,500
nonzeros	283,992
structural full rank?	yes
structural rank	7,500
# of blocks from dmperm	527
# strongly connected comp.	1
entries not in dmperm blocks	15,434
explicit zero entries	10,994
nonzero pattern symmetry	2%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	M. Hohn
editor	T. Davis
date	2003
kind	materials problem
2D/3D problem?	yes

Additional fields	size and type
b	full 7500-by-1

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	3,661,980	2,728,550	3,644,183
Cholesky flop count	4.5e+09	2.1e+09	3.4e+09
nnz(L+U), no partial pivoting	7,316,460	5,449,600	7,296,300
nnz(V) for QR, upper bound nnz(L) for LU	8,502,315	4,616,917	3,355,320
nnz(R) for QR, upper bound nnz(U) for LU	13,894,291	9,991,674	8,204,855

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 10994 explicit zero entries.

Maintained by Tim Davis, last updated 04-May-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.