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
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:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	26,344,054
Cholesky flop count	1.5e+10
nnz(L+U), no partial pivoting, with AMD	52,546,761
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	68,083,685
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	134,801,147

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

For a description of the statistics displayed above, click here.

Maintained by Tim Davis, last updated 12-Mar-2014.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.