Matrix properties
number of rows	20,414
number of columns	20,414
nonzeros	1,679,599
structural full rank?	yes
structural rank	20,414
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	100%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

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

Additional fields	size and type
b	full 20414-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	8,910,507
Cholesky flop count	7.4e+09
nnz(L+U), no partial pivoting, with AMD	17,800,600
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	15,387,648
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	34,803,686

SVD-based statistics:
norm(A)	0.633759
min(svd(A))	0.000896202
cond(A)	707.161
rank(A)	20,414
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.