Matrix: Lucifora/cell2

Description: Telecom Italia Mobile, GSM cell phone problem (cell2)

Lucifora/cell2 graph Lucifora/cell2 graph
(bipartite graph drawing) (graph drawing of A+A')


Lucifora/cell2

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: Lucifora
  • Click here for a description of the Lucifora group.
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  • download as a MATLAB mat-file, file size: 94 KB. Use UFget(935) or UFget('Lucifora/cell2') in MATLAB.
  • download in Matrix Market format, file size: 139 KB.
  • download in Rutherford/Boeing format, file size: 108 KB.

    Matrix properties
    number of rows7,055
    number of columns7,055
    nonzeros30,082
    # strongly connected comp.1
    explicit zero entries4,773
    nonzero pattern symmetry 100%
    numeric value symmetry 0%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorS. Lucifora
    editorT. Davis
    date2003
    kinddirected weighted graph
    2D/3D problem?no

    Additional fieldssize and type
    bfull 7055-by-1

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4773 explicit zero entries.

    SVD-based statistics:
    norm(A)402.706
    min(svd(A))3.6961e-15
    cond(A)1.08954e+17
    rank(A)7,054
    null space dimension1
    full numerical rank?no
    singular value gap6.19227e+13

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

    Lucifora/cell2 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.