Matrix properties
number of rows	108,384
number of columns	108,384
nonzeros	8,713,602
structural full rank?	yes
structural rank	108,384
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	1,454,022
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
nnz(chol(P*(A+A'+s*I)*P'))	21,833,283	28,854,942
Cholesky flop count	9.2e+09	2.2e+10
nnz(L+U), no partial pivoting	43,558,182	57,601,500
nnz(V) for QR, upper bound nnz(L) for LU	70,794,405	53,440,175
nnz(R) for QR, upper bound nnz(U) for LU	174,625,428	125,280,942

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1454022 explicit zero entries.

Maintained by Tim Davis, last updated 04-May-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.