Matrix properties
number of rows	17,758
number of columns	17,758
nonzeros	99,147
structural full rank?	yes
structural rank	17,758
# of blocks from dmperm	23
# strongly connected comp.	23
entries not in dmperm blocks	17
explicit zero entries	27,003
nonzero pattern symmetry	symmetric
numeric value symmetry	50%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	S. Hamm
editor	T. Davis
date	1991
kind	circuit simulation problem
2D/3D problem?	no

Additional fields	size and type
b	full 17758-by-1

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	70,192	72,147	70,175
Cholesky flop count	8.3e+05	9.4e+05	8.3e+05
nnz(L+U), no partial pivoting	122,626	126,536	122,609
nnz(V) for QR, upper bound nnz(L) for LU	3,843,500	4,152,460	3,663,631
nnz(R) for QR, upper bound nnz(U) for LU	8,431,920	9,157,396	9,043,523

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 27003 explicit zero entries.

Maintained by Tim Davis, last updated 30-Sep-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.