Matrix properties
number of rows	140,874
number of columns	140,874
nonzeros	3,568,176
structural full rank?	yes
structural rank	140,874
# of blocks from dmperm	3
# strongly connected comp.	3
explicit zero entries	4,245,228
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	C. Damhaug
editor	J. Koster
date	1999
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	41,000,460
Cholesky flop count	5.2e+10
nnz(L+U), no partial pivoting, with AMD	81,860,046
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	136,860,093
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	252,062,773

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4245228 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.