Matrix properties
number of rows	105
number of columns	105
nonzeros	210
structural full rank?	no
structural rank	15
# of blocks from dmperm	2
# strongly connected comp.	96
explicit zero entries	0
nonzero pattern symmetry	9%
numeric value symmetry	8%
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/n3c6.b1.105x15.sms     

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	389
Cholesky flop count	2.0e+03
nnz(L+U), no partial pivoting, with AMD	673
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,105
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	210

SVD-based statistics:
norm(A)	3.87298
min(svd(A))	0
cond(A)	Inf
rank(A)	14
sprank(A)-rank(A)	1
null space dimension	91
full numerical rank?	no
singular value gap	1.71456e+16

singular values (MAT file):	click here
SVD method used:	s = svd (full (A)) ;
status:	ok

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.