Matrix properties
number of rows	3,096
number of columns	3,096
nonzeros	90,841
structural full rank?	yes
structural rank	3,096
# of blocks from dmperm	2
# strongly connected comp.	2
explicit zero entries	15,503
nonzero pattern symmetry	symmetric
numeric value symmetry	43%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	A. Baggag, Y. Saad
editor	A. Baggag, Y. Saad
date	1994
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	150,537
Cholesky flop count	9.9e+06
nnz(L+U), no partial pivoting, with AMD	297,978
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	312,242
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	872,428

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 15503 explicit zero entries.

SVD-based statistics:
norm(A)	4.40661e+07
min(svd(A))	0.000982842
cond(A)	4.48354e+10
rank(A)	3,096
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.