Matrix properties
number of rows	36,057
number of columns	36,057
nonzeros	335,552
structural full rank?	yes
structural rank	36,057
# of blocks from dmperm	3,843
# strongly connected comp.	203
entries not in dmperm blocks	4,858
explicit zero entries	5,536
nonzero pattern symmetry	7%
numeric value symmetry	4%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	R. Melville, D. Long
editor	T. Davis
date	2001
kind	frequency-domain circuit simulation problem
2D/3D problem?	no

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	9,939,829	8,741,614	2,548,969
Cholesky flop count	7.3e+09	5.8e+09	1.3e+09
nnz(L+U), no partial pivoting	19,843,601	17,447,171	5,066,739
nnz(V) for QR, upper bound nnz(L) for LU	2,291,021	2,069,628	2,307,798
nnz(R) for QR, upper bound nnz(U) for LU	4,272,298	4,486,748	3,948,551

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 5536 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.