Matrix properties
number of rows	21,036
number of columns	21,036
nonzeros	303,468
structural full rank?	yes
structural rank	21,036
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	0%
type	complex
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	COMSOL
editor	T. Davis
date	2003
kind	electromagnetics problem
2D/3D problem?	yes

Additional fields	size and type
b	full 21036-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	2,299,528
Cholesky flop count	5.6e+08
nnz(L+U), no partial pivoting, with AMD	4,578,020
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	4,619,201
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	9,113,391

SVD-based statistics:
norm(A)	0.882885
min(svd(A))	8.64524e-05
cond(A)	10212.4
rank(A)	21,036
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 (R)) ; where [~,R,E] = spqr (A) with droptol of zero
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.