Matrix properties
number of rows	1,280
number of columns	1,280
nonzeros	22,778
structural full rank?	yes
structural rank	1,280
# of blocks from dmperm	20
# strongly connected comp.	20
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	complex
structure	Hermitian
Cholesky candidate?	yes
positive definite?	yes

author	A. Booten, M. Kooper, H. van der Vorst, S. Poedts, J. Goedbloed
editor	Z. Bai, D. Day, J. Demmel, J. Dongarra
date	1994
kind	electromagnetics problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	12,029	15,161	12,029
Cholesky flop count	1.5e+05	2.3e+05	1.5e+05
nnz(L+U), no partial pivoting	22,778	29,042	22,778
nnz(V) for QR, upper bound nnz(L) for LU	12,029	14,573	12,093
nnz(R) for QR, upper bound nnz(U) for LU	21,413	25,197	21,413

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.