Matrix properties
number of rows	30,412
number of columns	30,412
nonzeros	1,793,881
structural full rank?	yes
structural rank	30,412
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	97%
numeric value symmetry	72%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	J. Marchal
editor	J. Koster
date	2005
kind	computational fluid dynamics problem
2D/3D problem?	yes

Additional fields	size and type
b	full 30412-by-1

Notes:

from Parasol, http://www.parallab.uib.no/projects/parasol/data

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	14,654,006
Cholesky flop count	1.7e+10
nnz(L+U), no partial pivoting, with AMD	29,277,600
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	28,409,578
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	55,548,781

SVD-based statistics:
norm(A)	3.03295e+08
min(svd(A))	4.47254e-10
cond(A)	6.78126e+17
rank(A)	27,502
sprank(A)-rank(A)	2,910
null space dimension	2,910
full numerical rank?	no
singular value gap	1.05739

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.