Matrix properties
number of rows	952,203
number of columns	952,203
nonzeros	42,493,817
structural full rank?	yes
structural rank	952,203
# of blocks from dmperm	42,667
# strongly connected comp.	42,667
explicit zero entries	4,028,658
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	J. Weiher
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	141,363,607
Cholesky flop count	1.1e+11
nnz(L+U), no partial pivoting, with AMD	281,775,011
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	493,926,414
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	1,038,324,331

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4028658 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.