Matrix: GHS_psdef/inline_1

Description: stiffness matrix

GHS_psdef/inline_1 graph
(undirected graph drawing)

GHS_psdef/inline_1

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  • Matrix group: GHS_psdef
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  • download as a MATLAB mat-file, file size: 242 MB. Use UFget(1267) or UFget('GHS_psdef/inline_1') in MATLAB.
  • download in Matrix Market format, file size: 207 MB.
  • download in Rutherford/Boeing format, file size: 177 MB.

    Matrix properties
    number of rows503,712
    number of columns503,712
    nonzeros36,816,170
    structural full rank?yes
    structural rank503,712
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries172
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?yes

    authorS. Mayer
    editorJ. Koster
    date2004
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD222,416,390
    Cholesky flop count2.6e+11
    nnz(L+U), no partial pivoting, with AMD444,329,068
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD433,040,185
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD1,157,601,369

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 172 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.