Matrix: Meszaros/aa3

Description: linear programming problem, C. Meszaros test set

Meszaros/aa3 graph
(bipartite graph drawing)

Meszaros/aa3 dmperm of Meszaros/aa3

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  • Matrix group: Meszaros
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  • download as a MATLAB mat-file, file size: 83 KB. Use UFget(1681) or UFget('Meszaros/aa3') in MATLAB.
  • download in Matrix Market format, file size: 174 KB.
  • download in Rutherford/Boeing format, file size: 90 KB.

    Matrix properties
    number of rows825
    number of columns8,627
    structural full rank?no
    structural rank822
    # of blocks from dmperm6
    # 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
    2D/3D problem?no

    Additional fieldssize and type
    bfull 825-by-1
    cfull 8627-by-1
    lofull 8627-by-1
    hifull 8627-by-1
    z0full 1-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 COLAMD4,155,236
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD213,812

    SVD-based statistics:
    null space dimension119
    full numerical rank?no
    singular value gap6.13205e+12

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

    Meszaros/aa3 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.