Matrix properties
number of rows	141,347
number of columns	141,347
nonzeros	7,318,399
structural full rank?	yes
structural rank	141,347
# of blocks from dmperm	2
# strongly connected comp.	2
entries not in dmperm blocks	0
explicit zero entries	21,268
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	S. Mayer
editor	J. Koster
date	2004
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	26,344,054	25,655,414	25,603,883
Cholesky flop count	1.5e+10	1.1e+10	1.1e+10
nnz(L+U), no partial pivoting	52,546,761	51,169,481	51,066,419
nnz(V) for QR, upper bound nnz(L) for LU	68,083,685	47,567,238	47,570,292
nnz(R) for QR, upper bound nnz(U) for LU	134,801,147	91,315,902	91,105,626

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 21268 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.