Matrix properties
number of rows	4,960
number of columns	4,960
nonzeros	19,848
structural full rank?	yes
structural rank	4,960
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	4,036
nonzero pattern symmetry	symmetric
numeric value symmetry	31%
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 4960-by-1

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	14,377	14,619
Cholesky flop count	4.3e+04	4.5e+04
nnz(L+U), no partial pivoting	23,794	24,278
nnz(V) for QR, upper bound nnz(L) for LU	19,873	22,320
nnz(R) for QR, upper bound nnz(U) for LU	40,695	43,765

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4036 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.