Matrix properties
number of rows	200,200
number of columns	200,200
nonzeros	800,800
structural full rank?	yes
structural rank	200,200
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	0%
numeric value symmetry	0%
type	integer
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	V. Welker
editor	J.-G. Dumas
date	2008
kind	combinatorial problem
2D/3D problem?	no

Notes:

Simplicial complexes from Homology from Volkmar Welker.       
From Jean-Guillaume Dumas' Sparse Integer Matrix Collection,  
http://ljk.imag.fr/membres/Jean-Guillaume.Dumas/simc.html     
                                                              
http://www.mathematik.uni-marburg.de/~welker/                 
                                                              
Filename in JGD collection: Homology/m133.b3.200200x200200.sms

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	4,404,029,471
Cholesky flop count	2.7e+14
nnz(L+U), no partial pivoting, with AMD	8,807,858,742
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	7,534,245,143
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	8,286,730,443

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.