Matrix properties
number of rows	27,628
number of columns	27,628
nonzeros	206,670
structural full rank?	yes
structural rank	27,628
# of blocks from dmperm	6,361
# strongly connected comp.	6,361
entries not in dmperm blocks	272
explicit zero entries	236,228
nonzero pattern symmetry	100%
numeric value symmetry	22%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	IBM
editor	O. Schenk
date	2003
kind	semiconductor device problem
2D/3D problem?	yes

Additional fields	size and type
b	full 27628-by-1

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	1,306,054	1,006,226	1,029,849
Cholesky flop count	1.9e+08	1.1e+08	1.1e+08
nnz(L+U), no partial pivoting	2,584,480	1,984,824	2,032,342
nnz(V) for QR, upper bound nnz(L) for LU	1,655,386	1,544,705	1,631,278
nnz(R) for QR, upper bound nnz(U) for LU	3,115,120	2,954,893	3,090,228

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 236228 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.