Matrix properties
number of rows	29,736
number of columns	29,736
nonzeros	4,444,880
structural full rank?	yes
structural rank	29,736
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	25,168
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	C. Damhaug
editor	J. Koster
date	1999
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	28,383,936
Cholesky flop count	5.0e+10
nnz(L+U), no partial pivoting, with AMD	56,738,136
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	71,556,047
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	146,878,900

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 25168 explicit zero entries.

Maintained by Tim Davis, last updated 01-Apr-2011.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.