Matrix properties
number of rows	123,440
number of columns	123,440
nonzeros	3,085,406
structural full rank?	yes
structural rank	123,440
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	2,492
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	E. Rothberg
editor	T. Davis
date	1997
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	73,770,336	37,796,459
Cholesky flop count	1.3e+11	3.1e+10
nnz(L+U), no partial pivoting	147,417,232	75,469,478
nnz(V) for QR, upper bound nnz(L) for LU	131,852,166	65,559,895
nnz(R) for QR, upper bound nnz(U) for LU	239,137,717	124,218,660

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 2492 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.