Matrix properties
number of rows	120,750
number of columns	120,750
nonzeros	1,206,265
structural full rank?	yes
structural rank	120,750
# of blocks from dmperm	13,135
# strongly connected comp.	5
entries not in dmperm blocks	406,980
explicit zero entries	17,959
nonzero pattern symmetry	24%
numeric value symmetry	11%
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'))	33,508,325	22,863,184	3,863,318
Cholesky flop count	6.8e+10	2.4e+10	1.7e+09
nnz(L+U), no partial pivoting	66,895,900	45,605,618	8,012,866
nnz(V) for QR, upper bound nnz(L) for LU	7,437,600	10,230,432	2,881,957
nnz(R) for QR, upper bound nnz(U) for LU	20,926,670	28,197,471	6,447,302

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 17959 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.