Matrix properties
number of rows	39,899
number of columns	39,899
nonzeros	195,429
structural full rank?	yes
structural rank	39,899
# of blocks from dmperm	4,466
# strongly connected comp.	1,384
explicit zero entries	1,835
nonzero pattern symmetry	98%
numeric value symmetry	33%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	Rajat
editor	T. Davis
date	2006
kind	circuit simulation problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	151,808
Cholesky flop count	7.3e+05
nnz(L+U), no partial pivoting, with AMD	263,717
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	4,714,724
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	23,415,783

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1835 explicit zero entries.

SVD-based statistics:
norm(A)	998383
min(svd(A))	4.38587e-10
cond(A)	2.27636e+15
rank(A)	39,827
sprank(A)-rank(A)	72
null space dimension	72
full numerical rank?	no
singular value gap	1.03338

singular values (MAT file):	click here
SVD method used:	s = svd (full (A))
status:	ok

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.