Matrix properties
number of rows	48,600
number of columns	48,600
nonzeros	1,181,120
structural full rank?	yes
structural rank	48,600
# of blocks from dmperm	31
# strongly connected comp.	31
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	78%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	D. Ronis
editor	T. Davis
date	2001
kind	materials problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	13,590,236
Cholesky flop count	1.1e+10
nnz(L+U), no partial pivoting, with AMD	27,131,872
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	30,495,478
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	57,323,387

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.