Matrix properties
number of rows	141,120
number of columns	141,120
nonzeros	846,720
structural full rank?	yes
structural rank	141,120
# 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/ch7-8.b5.141120x141120.sms

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	2,430,151,160
Cholesky flop count	1.1e+14
nnz(L+U), no partial pivoting, with AMD	4,860,161,200
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	5,435,128,606
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	6,165,627,922

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.