Matrix properties
number of rows	38,744
number of columns	38,744
nonzeros	1,771,722
structural full rank?	yes
structural rank	38,744
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	53%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	H. Simon
editor	H. Simon
date	1993
kind	computational fluid dynamics problem
2D/3D problem?	yes

Additional fields	size and type
b	full 38744-by-1
x	full 38744-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	23,112,409
Cholesky flop count	2.2e+10
nnz(L+U), no partial pivoting, with AMD	46,186,074
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	23,041,854
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	44,250,239

SVD-based statistics:
norm(A)	3992.38
min(svd(A))	7.35089e-06
cond(A)	5.43116e+08
rank(A)	38,744
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.