Matrix: Meszaros/scfxm1-2r

Description: LP sequence: scfxm1-2r-4, 8, 16, 27, 32, 64, 96, 128, 256

Meszaros/scfxm1-2r graph
(bipartite graph drawing)

Meszaros/scfxm1-2r dmperm of Meszaros/scfxm1-2r

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  • Matrix group: Meszaros
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  • download as a MATLAB mat-file, file size: 2 MB. Use UFget(1831) or UFget('Meszaros/scfxm1-2r') in MATLAB.
  • download in Matrix Market format, file size: 3 MB.
  • download in Rutherford/Boeing format, file size: 2 MB.

    Matrix properties
    number of rows37,980
    number of columns65,943
    structural full rank?yes
    structural rank37,980
    # of blocks from dmperm1,539
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    Cholesky candidate?no
    positive definite?no

    editorC. Meszaros
    kindlinear programming problem sequence
    2D/3D problem?no

    Additional fieldssize and type
    Acell 9-by-1
    bcell 9-by-1
    ccell 9-by-1
    locell 9-by-1
    hicell 9-by-1
    z0cell 9-by-1

    Converted to standard form via Resende and Veiga's mpsrd:
    minimize c'*x, subject to A*x=b and lo <= x <= hi        
    Determinisitic equivalent of stochastic LP               

    Ordering statistics:result
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD51,127,671
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD2,105,931

    SVD-based statistics:
    null space dimension0
    full numerical rank?yes

    singular values (MAT file):click here
    SVD method used:s = svd (full (R)) ; where [~,R,E] = spqr (A') with droptol of zero

    Meszaros/scfxm1-2r 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.