Matrix properties
number of rows	48,066
number of columns	48,066
nonzeros	360,428
structural full rank?	yes
structural rank	48,066
# of blocks from dmperm	51
# strongly connected comp.	51
explicit zero entries	100
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author	IBM
editor	O. Schenk
date	2006
kind	optimization problem
2D/3D problem?	no

Additional fields	size and type
b	full 48066-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	690,538
Cholesky flop count	7.4e+07
nnz(L+U), no partial pivoting, with AMD	1,333,010
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	62,012,170
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	97,561,036

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 100 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.