Matrix properties
number of rows	245,874
number of columns	245,874
nonzeros	13,150,496
structural full rank?	yes
structural rank	245,874
# of blocks from dmperm	7
# strongly connected comp.	7
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	S. Ben Elechi
editor	T. Davis
date	2007
kind	2D/3D problem
2D/3D problem?	yes

Additional fields	size and type
b	sparse 245874-by-40543

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	56,601,517
Cholesky flop count	3.3e+10
nnz(L+U), no partial pivoting, with AMD	112,957,160
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	160,985,992
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	318,905,944

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.