Matrix: Gset/G55

Description: Random matrix, 0.05% uniformly distributed. G55=pattern of G56

Gset/G55 graph
(undirected graph drawing)

Gset/G55
scc of Gset/G55

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  • Matrix group: Gset
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  • download as a MATLAB mat-file, file size: 65 KB. Use UFget(519) or UFget('Gset/G55') in MATLAB.
  • download in Matrix Market format, file size: 45 KB.
  • download in Rutherford/Boeing format, file size: 37 KB.

    Matrix properties
    number of rows5,000
    number of columns5,000
    nonzeros24,996
    # strongly connected comp.32
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typebinary
    structuresymmetric
    Cholesky candidate?no
    positive definite?no

    authorC. Helmberg
    editorY. Ye
    date1996
    kindduplicate undirected random graph
    2D/3D problem?no

    Notes:

    This matrix is the nonzero pattern of Gset/G56

    SVD-based statistics:
    norm(A)6.23114
    min(svd(A))1.36908e-17
    cond(A)4.55134e+17
    rank(A)4,966
    null space dimension34
    full numerical rank?no
    singular value gap2.51327e+10

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

    Gset/G55 svd

    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.