Matrix: GHS_psdef/bmwcra_1

Description: stiffness matrix

GHS_psdef/bmwcra_1 graph
(undirected graph drawing)


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  • Matrix group: GHS_psdef
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  • download as a MATLAB mat-file, file size: 76 MB. Use UFget(1254) or UFget('GHS_psdef/bmwcra_1') in MATLAB.
  • download in Matrix Market format, file size: 65 MB.
  • download in Rutherford/Boeing format, file size: 54 MB.

    Matrix properties
    number of rows148,770
    number of columns148,770
    structural full rank?yes
    structural rank148,770
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries2,400
    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 AMD90,924,001
    Cholesky flop count1.1e+11
    nnz(L+U), no partial pivoting, with AMD181,699,232
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD158,509,398
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD308,970,286

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 2400 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.