Matrix properties
number of rows	213,453
number of columns	213,453
nonzeros	11,985,111
structural full rank?	yes
structural rank	213,453
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	binary
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	C. Damhaug
editor	N. Gould, Y. Hu, J. Scott
date	2004
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	91,897,326
Cholesky flop count	1.6e+11
nnz(L+U), no partial pivoting, with AMD	183,581,199
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	245,556,264
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	464,144,670

For a description of the statistics displayed above, click here.

Maintained by Tim Davis, last updated 12-Mar-2014.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.