Matrix: Mittelmann/pds-40

Description: Patient distribution (evacuation) system

Mittelmann/pds-40 graph
(bipartite graph drawing)

Mittelmann/pds-40 dmperm of Mittelmann/pds-40
scc of Mittelmann/pds-40

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  • download as a MATLAB mat-file, file size: 1 MB. Use UFget(1647) or UFget('Mittelmann/pds-40') in MATLAB.
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    Matrix properties
    number of rows66,844
    number of columns217,531
    structural full rank?no
    structural rank66,641
    # of blocks from dmperm1,302
    # strongly connected comp.204
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    Cholesky candidate?no
    positive definite?no

    authorW. Carolan, J. Hill, J. Kennington, S. Niemi, S. Wichmann
    editorH. Mittelmann
    kindlinear programming problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 66844-by-1
    cfull 217531-by-1
    lofull 217531-by-1
    hifull 217531-by-1
    z0full 1-by-1


    Hans Mittelmann test set,       
    minimize c'*x, subject to A*x=b and lo <= x <= hi                  
    PDS:  Patient distribution (evacuation) system. see                
    W. Carolan, J. Hill, J. Kennington, S. Niemi, and S. Wichmann, "An 
    Empirical Evaluation of the KORBX Algorithms for Military Airlift,"
    Applications, Operations Research, 38, (1990), 240-248.            

    Ordering statistics:result
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD831,865,019
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD26,013,313

    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.