Matrix: Meszaros/model2

Description: linear programming problem, C. Meszaros test set

Meszaros/model2 graph
(bipartite graph drawing)


Meszaros/model2 dmperm of Meszaros/model2
scc of Meszaros/model2

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  • download as a MATLAB mat-file, file size: 18 KB. Use UFget(1723) or UFget('Meszaros/model2') in MATLAB.
  • download in Matrix Market format, file size: 30 KB.
  • download in Rutherford/Boeing format, file size: 19 KB.

    Matrix properties
    number of rows379
    number of columns1,321
    nonzeros7,607
    structural full rank?yes
    structural rank379
    # of blocks from dmperm13
    # strongly connected comp.2
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typereal
    structurerectangular
    Cholesky candidate?no
    positive definite?no

    author
    editorC. Meszaros
    date2004
    kindlinear programming problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 379-by-1
    cfull 1321-by-1
    lofull 1321-by-1
    hifull 1321-by-1
    z0full 1-by-1

    Notes:

    http://www.sztaki.hu/~meszaros/public_ftp/lptestset      
    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 COLAMD106,145
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD13,159

    SVD-based statistics:
    norm(A)2327.27
    min(svd(A))1.57592e-16
    cond(A)1.47677e+19
    rank(A)377
    sprank(A)-rank(A)2
    null space dimension2
    full numerical rank?no
    singular value gap2.07933e+13

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

    Meszaros/model2 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.