Matrix properties
number of rows	47,072
number of columns	47,072
nonzeros	2,329,056
structural full rank?	yes
structural rank	47,072
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	7,842
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	S. Mayer
editor	J. Koster
date	2004
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	5,531,909
Cholesky flop count	1.3e+09
nnz(L+U), no partial pivoting, with AMD	11,016,746
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	13,749,949
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	28,194,078

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 7842 explicit zero entries.

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.