Matrix properties
number of rows	147,900
number of columns	147,900
nonzeros	3,489,300
structural full rank?	yes
structural rank	147,900
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	95%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	I. Botonakis
editor	T. Davis
date	2007
kind	thermal problem
2D/3D problem?	yes

Notes:

This is the smallest problem whose results are useful.

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	46,622,496	28,339,721
Cholesky flop count	4.9e+10	1.3e+10
nnz(L+U), no partial pivoting	93,097,092	56,531,542
nnz(V) for QR, upper bound nnz(L) for LU	96,333,467	47,176,290
nnz(R) for QR, upper bound nnz(U) for LU	179,092,189	89,310,050

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.