Matrix: Mittelmann/pds-50

Description: Patient distribution (evacuation) system

Mittelmann/pds-50 graph
(bipartite graph drawing)

Mittelmann/pds-50 dmperm of Mittelmann/pds-50
scc of Mittelmann/pds-50

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  • download as a MATLAB mat-file, file size: 1 MB. Use UFget(1648) or UFget('Mittelmann/pds-50') in MATLAB.
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    Matrix properties
    number of rows83,060
    number of columns275,814
    structural full rank?no
    structural rank82,837
    # of blocks from dmperm1,405
    # strongly connected comp.224
    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 83060-by-1
    cfull 275814-by-1
    lofull 275814-by-1
    hifull 275814-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 COLAMD1,341,173,334
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD39,895,809

    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.