Matrix properties
number of rows	23,052
number of columns	23,052
nonzeros	1,143,140
structural full rank?	yes
structural rank	23,052
# of blocks from dmperm	1
# strongly connected comp.	1
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	structural problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	2,732,511	2,941,940
Cholesky flop count	6.2e+08	6.6e+08
nnz(L+U), no partial pivoting	5,441,970	5,860,828
nnz(V) for QR, upper bound nnz(L) for LU	7,616,171	6,248,485
nnz(R) for QR, upper bound nnz(U) for LU	15,718,121	11,923,074

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.