Matrix properties
number of rows	16,428
number of columns	16,428
nonzeros	948,696
structural full rank?	yes
structural rank	16,428
# of blocks from dmperm	779
# strongly connected comp.	1
entries not in dmperm blocks	34,370
explicit zero entries	25,130
nonzero pattern symmetry	1%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	M. Hohn
editor	T. Davis
date	2003
kind	materials problem
2D/3D problem?	yes

Additional fields	size and type
b	full 16428-by-1

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	17,308,496	12,802,082	18,113,588
Cholesky flop count	5.0e+10	2.3e+10	3.8e+10
nnz(L+U), no partial pivoting	34,600,564	25,587,736	36,245,118
nnz(V) for QR, upper bound nnz(L) for LU	40,755,608	17,656,800	16,612,672
nnz(R) for QR, upper bound nnz(U) for LU	66,091,121	41,844,107	42,061,287

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 25130 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.