Matrix properties
number of rows	46,772
number of columns	46,772
nonzeros	2,060,662
structural full rank?	yes
structural rank	46,772
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	28,632
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	R. Grimes
editor	T. Davis
date	2002
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	7,655,531	7,647,746
Cholesky flop count	2.2e+09	2.2e+09
nnz(L+U), no partial pivoting	15,264,290	15,248,720
nnz(V) for QR, upper bound nnz(L) for LU	11,206,745	11,902,240
nnz(R) for QR, upper bound nnz(U) for LU	22,229,800	22,627,699

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 28632 explicit zero entries.

Maintained by Tim Davis, last updated 30-Sep-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.