Matrix properties
number of rows	49,666
number of columns	49,666
nonzeros	558,594
structural full rank?	yes
structural rank	49,666
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author	M. Arioli
editor	N. Gould, Y. Hu, J. Scott
date	2004
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	2,421,899
Cholesky flop count	3.8e+08
nnz(L+U), no partial pivoting, with AMD	4,794,132
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	5,316,111
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	12,061,998

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.