Matrix: Andrianov/net150

Description: net150 matrix from Alexander Andrianov, SAS Institute Inc.

Andrianov/net150 graph
(undirected graph drawing)


Andrianov/net150 dmperm of Andrianov/net150

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  • Matrix group: Andrianov
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  • download as a MATLAB mat-file, file size: 4 MB. Use UFget(1388) or UFget('Andrianov/net150') in MATLAB.
  • download in Matrix Market format, file size: 3 MB.
  • download in Rutherford/Boeing format, file size: 3 MB.

    Matrix properties
    number of rows43,520
    number of columns43,520
    nonzeros3,121,200
    structural full rank?yes
    structural rank43,520
    # of blocks from dmperm2
    # strongly connected comp.2
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typebinary
    structuresymmetric
    Cholesky candidate?yes
    positive definite?no

    authorA. Andrianov
    editorT. Davis
    date2006
    kindoptimization problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD58,450,161
    Cholesky flop count3.1e+11
    nnz(L+U), no partial pivoting, with AMD116,856,802
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD305,055,480
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD411,847,215

    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.