JGD_BIBD/bibd_81_2

Balanced Incomplete Block Design from Mark Giesbrecht, Univ. of Waterloo
Name bibd_81_2
Group JGD_BIBD
Matrix ID 1939
Num Rows 3,240
Num Cols 3,240
Nonzeros 3,240
Pattern Entries 3,240
Kind Combinatorial Problem
Symmetric Yes
Date 2008
Author M. Giesbrecht
Editor J.-G. Dumas
Structural Rank 3,240
Structural Rank Full true
Num Dmperm Blocks 3,240
Strongly Connect Components 3,240
Num Explicit Zeros 0
Pattern Symmetry 100%
Numeric Symmetry 100%
Cholesky Candidate yes
Positive Definite yes
Type binary
SVD Statistics
Matrix Norm 1
Minimum Singular Value 1
Condition Number 1
Rank 3,240
sprank(A)-rank(A) 0
Null Space Dimension 0
Full Numerical Rank? yes
Download Singular Values MATLAB
Download MATLAB Rutherford Boeing Matrix Market
Notes
Balanced Incomplete Block Design from Mark Giesbrecht, Univ. of Waterloo
From Jean-Guillaume Dumas' Sparse Integer Matrix Collection,            
http://ljk.imag.fr/membres/Jean-Guillaume.Dumas/simc.html               
                                                                        
Filename in JGD collection: BIBD/bibd_81_2_3240x3240.sms