Matrix properties
number of rows	29,957
number of columns	29,957
nonzeros	1,990,919
structural full rank?	yes
structural rank	29,957
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	4,122
nonzero pattern symmetry	symmetric
numeric value symmetry	99%
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 29957-by-1

Notes:

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

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	19,046,921	9,571,671
Cholesky flop count	3.2e+10	7.1e+09
nnz(L+U), no partial pivoting	38,063,885	19,113,385
nnz(V) for QR, upper bound nnz(L) for LU	35,545,934	23,003,641
nnz(R) for QR, upper bound nnz(U) for LU	81,117,995	54,978,154

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4122 explicit zero entries.

Maintained by Tim Davis, last updated 04-May-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.