Matrix properties
number of rows	27,792
number of columns	27,792
nonzeros	173,796
structural full rank?	yes
structural rank	27,792
# of blocks from dmperm	3,460
# strongly connected comp.	285
entries not in dmperm blocks	6,348
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	J. More'
editor	P. Toint
date	1989
kind	2D/3D problem
2D/3D problem?	yes

Additional fields	size and type
b	full 27792-by-1

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	7,006,763	5,250,713	2,561,068
Cholesky flop count	7.6e+09	3.9e+09	9.2e+08
nnz(L+U), no partial pivoting	13,985,734	10,473,634	5,100,692
nnz(V) for QR, upper bound nnz(L) for LU	18,366,688	10,333,495	5,249,804
nnz(R) for QR, upper bound nnz(U) for LU	30,659,927	17,913,860	9,239,288

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.