Matrix properties
number of rows	24,696
number of columns	24,696
nonzeros	583,770
structural full rank?	yes
structural rank	24,696
# of blocks from dmperm	3
# strongly connected comp.	3
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	R. Grimes
editor	T. Davis
date	1995
kind	materials problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	5,037,495	3,213,124	3,209,643
Cholesky flop count	2.0e+09	6.5e+08	6.3e+08
nnz(L+U), no partial pivoting	10,050,294	6,401,552	6,394,590
nnz(V) for QR, upper bound nnz(L) for LU	6,594,048	4,704,907	4,580,199
nnz(R) for QR, upper bound nnz(U) for LU	12,126,954	9,037,687	8,709,003

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.