NYPA/Maragal_8 graph

Matrix: NYPA/Maragal_8

Description: Rank deficient problem, D. Maragal, NY Power Authority

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  • Matrix group: NYPA
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    NYPA/Maragal_8

    dmperm of NYPA/Maragal_8

    scc of NYPA/Maragal_8

    Matrix properties
    number of rows33,212
    number of columns75,077
    nonzeros1,308,415
    structural full rank?no
    structural rank18,456
    # of blocks from dmperm1,799
    # strongly connected comp.14,353
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typereal
    structurerectangular
    Cholesky candidate?no
    positive definite?no

    authorD. Maragal
    editorT. Davis
    date2008
    kindleast squares problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 33212-by-1

    Ordering statistics:AMD METIS
    nnz(V) for QR, upper bound nnz(L) for LU219,451,939 231,969,522
    nnz(R) for QR, upper bound nnz(U) for LU68,411,814 70,429,606

    Maintained by Tim Davis, last updated 05-Nov-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.