Matrix: GHS_psdef/bmw7st_1

Description: stiffness matrix

GHS_psdef/bmw7st_1 graph
(undirected graph drawing)

GHS_psdef/bmw7st_1 dmperm of GHS_psdef/bmw7st_1

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  • Matrix group: GHS_psdef
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  • download as a MATLAB mat-file, file size: 52 MB. Use UFget(1253) or UFget('GHS_psdef/bmw7st_1') in MATLAB.
  • download in Matrix Market format, file size: 46 MB.
  • download in Rutherford/Boeing format, file size: 39 MB.

    Matrix properties
    number of rows141,347
    number of columns141,347
    structural full rank?yes
    structural rank141,347
    # of blocks from dmperm2
    # strongly connected comp.2
    explicit zero entries21,268
    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 AMD26,344,054
    Cholesky flop count1.5e+10
    nnz(L+U), no partial pivoting, with AMD52,546,761
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD68,083,685
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD134,801,147

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 21268 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.