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
entries not in dmperm blocks	0
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:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	41,000,460	40,393,618	41,000,460
Cholesky flop count	5.2e+10	4.5e+10	5.2e+10
nnz(L+U), no partial pivoting	81,860,046	80,646,362	81,860,046
nnz(V) for QR, upper bound nnz(L) for LU	136,860,093	78,392,447	77,386,230
nnz(R) for QR, upper bound nnz(U) for LU	252,062,773	148,035,188	145,891,977

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

Maintained by Tim Davis, last updated 30-Sep-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.