{
    matrix_id: '2105',
    name: 'n3c6-b8',
    group: 'JGD_Homology',
    description: 'Simplicial complexes from Homology from Volkmar Welker.',
    author: 'V. Welker',
    editor: 'J.-G. Dumas',
    date: '2008',
    kind: 'combinatorial problem',
    problem_2D_or_3D: '0',
    num_rows: '4935',
    num_cols: '6435',
    nonzeros: '44415',
    num_explicit_zeros: '0',
    num_strongly_connected_components: '1',
    num_dmperm_blocks: '1',
    structural_full_rank: 'true',
    structural_rank: '4935',
    pattern_symmetry: '0.000',
    numeric_symmetry: '0.000',
    rb_type: 'integer',
    structure: 'rectangular',
    cholesky_candidate: 'no',
    positive_definite: '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.b8.4935x6435.sms  
',
    norm: '3.872983e+00',
    min_singular_value: '4.896488e-16',
    condition_number: '7909717497288232',
    svd_rank: '3003',
    sprank_minus_rank: '1932',
    null_space_dimension: '1932',
    full_numerical_rank: 'no',
    svd_gap: '183473168289660.687500',
    image_files: 'n3c6-b8.png,n3c6-b8_svd.png,n3c6-b8_graph.gif,',
}
