Matrix properties
number of rows	18,000
number of columns	18,000
nonzeros	6,897,316
structural full rank?	yes
structural rank	18,000
# 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	author unknown
editor	T. Davis
date	2003
kind	2D/3D problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	51,202,639	40,500,209
Cholesky flop count	2.0e+11	1.1e+11
nnz(L+U), no partial pivoting	102,387,278	80,982,418
nnz(V) for QR, upper bound nnz(L) for LU	48,412,972	54,699,472
nnz(R) for QR, upper bound nnz(U) for LU	94,422,866	92,635,288

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.