Matrix: Mittelmann/neos2

Description: Linear programming problem (H. Mittelmann test set)

Mittelmann/neos2 graph
(bipartite graph drawing)


Mittelmann/neos2

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  • Matrix group: Mittelmann
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  • download as a MATLAB mat-file, file size: 1 MB. Use UFget(1672) or UFget('Mittelmann/neos2') in MATLAB.
  • download in Matrix Market format, file size: 2 MB.
  • download in Rutherford/Boeing format, file size: 2 MB.

    Matrix properties
    number of rows132,568
    number of columns134,128
    nonzeros685,087
    structural full rank?yes
    structural rank132,568
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typeinteger
    structurerectangular
    Cholesky candidate?no
    positive definite?no

    author
    editorH. Mittelmann
    date2005
    kindlinear programming problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 132568-by-1
    cfull 134128-by-1
    lofull 134128-by-1
    hifull 134128-by-1
    z0full 1-by-1

    Notes:

    Hans Mittelmann test set, http://plato.asu.edu/ftp/lptestset
    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 COLAMD202,182,285
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD8,560,747,073

    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.