Matrix properties
number of rows	181,343
number of columns	181,343
nonzeros	6,869,939
structural full rank?	yes
structural rank	181,343
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	4,193,606
nonzero pattern symmetry	symmetric
numeric value symmetry	9%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

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

Additional fields	size and type
b	full 181343-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	216,005,751
Cholesky flop count	6.3e+11
nnz(L+U), no partial pivoting, with AMD	431,830,159
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	330,457,100
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	605,350,165

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4193606 explicit zero entries.

For a description of the statistics displayed above, click here.

Maintained by Tim Davis, last updated 12-Mar-2014.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.