Matrix properties
number of rows	178,866
number of columns	178,866
nonzeros	961,368
structural full rank?	yes
structural rank	178,866
# of blocks from dmperm	21
# strongly connected comp.	21
explicit zero entries	422
nonzero pattern symmetry	100%
numeric value symmetry	24%
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:

Small circuit from Kiran Gullapalli, Freescale Semiconductor       
Factorization is fast, but dominates the transient simulation time.

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	1,092,205
Cholesky flop count	1.1e+08
nnz(L+U), no partial pivoting, with AMD	2,005,544
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	3,323,637,030
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	7,770,731,777

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 422 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.