Matrix properties
number of rows	45,330
number of columns	45,330
nonzeros	3,213,618
structural full rank?	yes
structural rank	45,330
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	binary
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

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

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	27,977,041
Cholesky flop count	3.7e+10
nnz(L+U), no partial pivoting, with AMD	55,908,752
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	219,164,692
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	294,132,186

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.