Matrix properties
number of rows	245,874
number of columns	245,874
nonzeros	13,150,496
structural full rank?	yes
structural rank	245,874
# of blocks from dmperm	7
# strongly connected comp.	7
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	S. Ben Elechi
editor	T. Davis
date	2007
kind	2D/3D problem
2D/3D problem?	yes

Additional fields	size and type
b	sparse 245874-by-40543

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	56,601,517	52,993,795	53,152,627
Cholesky flop count	3.3e+10	2.6e+10	2.6e+10
nnz(L+U), no partial pivoting	112,957,160	105,741,716	106,059,380
nnz(V) for QR, upper bound nnz(L) for LU	160,985,992	84,813,520	85,092,130
nnz(R) for QR, upper bound nnz(U) for LU	318,905,944	160,910,608	161,416,552

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.