Matrix properties
number of rows	17,160
number of columns	286
nonzeros	34,320
structural full rank?	yes
structural rank	286
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	0%
numeric value symmetry	0%
type	integer
structure	rectangular
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/shar_te2.b1.17160x286.sms

Ordering statistics:	result
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	3,107,902
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	32,296

SVD-based statistics:
norm(A)	12.49
min(svd(A))	8.00437e-13
cond(A)	1.5604e+13
rank(A)	285
sprank(A)-rank(A)	1
null space dimension	1
full numerical rank?	no
singular value gap	1.32215e+13

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.