Matrix properties
number of rows	108,384
number of columns	108,384
nonzeros	8,713,602
structural full rank?	yes
structural rank	108,384
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	1,454,022
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	C. Damhaug
editor	J. Koster
date	1999
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	21,833,283
Cholesky flop count	9.2e+09
nnz(L+U), no partial pivoting, with AMD	43,558,182
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	70,794,405
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	174,625,428

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1454022 explicit zero entries.

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.