Matrix: GHS_psdef/vanbody

Description: stiffness matrix

GHS_psdef/vanbody graph
(undirected graph drawing)


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  • Matrix group: GHS_psdef
  • Click here for a description of the GHS_psdef group.
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  • download as a MATLAB mat-file, file size: 16 MB. Use UFget(1287) or UFget('GHS_psdef/vanbody') in MATLAB.
  • download in Matrix Market format, file size: 14 MB.
  • download in Rutherford/Boeing format, file size: 12 MB.

    Matrix properties
    number of rows47,072
    number of columns47,072
    structural full rank?yes
    structural rank47,072
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries7,842
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    Cholesky candidate?yes
    positive definite?yes

    authorS. Mayer
    editorJ. Koster
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD5,531,909
    Cholesky flop count1.3e+09
    nnz(L+U), no partial pivoting, with AMD11,016,746
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD13,749,949
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD28,194,078

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 7842 explicit zero entries.

    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.