Matrix properties
number of rows	1,220
number of columns	1,220
nonzeros	5,892
structural full rank?	yes
structural rank	1,220
# of blocks from dmperm	188
# strongly connected comp.	34
explicit zero entries	0
nonzero pattern symmetry	82%
numeric value symmetry	33%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	R. Hoekstra
editor	T. Davis
date	2003
kind	subsequent circuit simulation problem
2D/3D problem?	no

Additional fields	size and type
b	full 1220-by-1

Notes:

next: Sandia/fpga_dcop_46 first: Sandia/fpga_dcop_01

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	5,541
Cholesky flop count	2.8e+04
nnz(L+U), no partial pivoting, with AMD	9,862
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	10,439
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	26,646

SVD-based statistics:
norm(A)	2.87165
min(svd(A))	9.26444e-13
cond(A)	3.09965e+12
rank(A)	1,220
sprank(A)-rank(A)	0
null space dimension	0
full numerical rank?	yes

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.