Matrix: Meszaros/sc205-2r

Description: LP sequence: sc205-2r-4, 8, 16, 27, 32, 50, 64, 100, 200, 400, 800, 1600

Meszaros/sc205-2r graph
(bipartite graph drawing)


Meszaros/sc205-2r dmperm of Meszaros/sc205-2r
scc of Meszaros/sc205-2r

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  • download as a MATLAB mat-file, file size: 795 KB. Use UFget(1826) or UFget('Meszaros/sc205-2r') in MATLAB.
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    Matrix properties
    number of rows35,213
    number of columns62,423
    nonzeros123,239
    structural full rank?yes
    structural rank35,213
    # of blocks from dmperm2
    # 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 sequence
    2D/3D problem?no

    Additional fieldssize and type
    Acell 12-by-1
    bcell 12-by-1
    ccell 12-by-1
    locell 12-by-1
    hicell 12-by-1
    z0cell 12-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        
    Determinisitic equivalent of stochastic LP               
    

    Ordering statistics:result
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD157,408,634
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD21,932,359

    SVD-based statistics:
    norm(A)56.646
    min(svd(A))0.0424368
    cond(A)1334.83
    rank(A)35,213
    sprank(A)-rank(A)0
    null space dimension0
    full numerical rank?yes

    singular values (MAT file):click here
    SVD method used:s = svd (full (R)) ; where [~,R,E] = spqr (A') with droptol of zero
    status:ok

    Meszaros/sc205-2r 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.