Matrix properties
number of rows	3,523,317
number of columns	3,523,317
nonzeros	14,865,409
structural full rank?	yes
structural rank	3,523,317
# of blocks from dmperm	1,062
# strongly connected comp.	1,062
explicit zero entries	4,328,784
nonzero pattern symmetry	91%
numeric value symmetry	72%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	K. Gullapalli
editor	T. Davis
date	2010
kind	circuit simulation problem
2D/3D problem?	no

Notes:

Large circuit from Kiran Gullapalli, Freescale Semiconductor
DC analysis, related to Freescale/circuit5M matrix.         

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	34,068,820
Cholesky flop count	8.3e+09
nnz(L+U), no partial pivoting, with AMD	64,614,323
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	56,926,778
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	107,044,209

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4328784 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.