Matrix properties
number of rows	54,924
number of columns	54,924
nonzeros	2,962,152
structural full rank?	yes
structural rank	54,924
# 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	C. Damhaug
editor	N. Gould, Y. Hu, J. Scott
date	2004
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	9,801,174
Cholesky flop count	3.0e+09
nnz(L+U), no partial pivoting, with AMD	19,547,424
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	18,591,978
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	36,881,058

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.