Matrix: DNVS/fcondp2

Description: Gould, Hu, & Scott: oil production platform from Christian Damhaug

DNVS/fcondp2 graph
(undirected graph drawing)

DNVS/fcondp2

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  • Matrix group: DNVS
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  • download as a MATLAB mat-file, file size: 3 MB. Use UFget(1260) or UFget('DNVS/fcondp2') in MATLAB.
  • download in Matrix Market format, file size: 12 MB.
  • download in Rutherford/Boeing format, file size: 3 MB.

    Matrix properties
    number of rows201,822
    number of columns201,822
    nonzeros11,294,316
    structural full rank?yes
    structural rank201,822
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typebinary
    structuresymmetric
    Cholesky candidate?yes
    positive definite?no

    authorC. Damhaug
    editorN. Gould, Y. Hu, J. Scott
    date2004
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD47,258,256
    Cholesky flop count4.5e+10
    nnz(L+U), no partial pivoting, with AMD94,314,690
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD177,655,683
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD321,624,876

    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.