Matrix properties
number of rows	146,689
number of columns	146,689
nonzeros	3,636,643
structural full rank?	yes
structural rank	146,689
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	6
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	L. Dubcova, J. Cerveny, and P. Solin
editor	T. Davis
date	2007
kind	2D/3D problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	7,252,162
Cholesky flop count	1.4e+09
nnz(L+U), no partial pivoting, with AMD	14,357,635
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	27,382,360
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	89,360,545

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 6 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.