Matrix: Meszaros/nsir

Description: LP sequence: nsir1 and nsir2

Meszaros/nsir graph
(bipartite graph drawing)

Meszaros/nsir dmperm of Meszaros/nsir
scc of Meszaros/nsir

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  • Matrix group: Meszaros
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  • download as a MATLAB mat-file, file size: 658 KB. Use UFget(1821) or UFget('Meszaros/nsir') in MATLAB.
  • download in Matrix Market format, file size: 1 MB.
  • download in Rutherford/Boeing format, file size: 641 KB.

    Matrix properties
    number of rows4,453
    number of columns10,057
    structural full rank?yes
    structural rank4,453
    # of blocks from dmperm4
    # strongly connected comp.4
    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 2-by-1
    bcell 2-by-1
    ccell 2-by-1
    locell 2-by-1
    hicell 2-by-1
    z0cell 2-by-1

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

    Ordering statistics:result
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD3,110,929
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD379,177

    SVD-based statistics:
    null space dimension62
    full numerical rank?no
    singular value gap1.02291

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

    Meszaros/nsir 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.