Matrix properties
number of rows	1,508,065
number of columns	1,508,065
nonzeros	52,259,885
structural full rank?	yes
structural rank	1,508,065
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	412,440
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	AutoForm Eng.
editor	O. Schenk
date	2006
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	476,466,992
Cholesky flop count	9.3e+11
nnz(L+U), no partial pivoting, with AMD	951,425,919
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	876,532,092
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	1,671,064,070

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 412440 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.