Matrix: Schenk_AFE/af_shell10

Description: AutoForm Eng., Zurich. indefinite. sheet metal forming

Schenk_AFE/af_shell10 graph
(undirected graph drawing)


Schenk_AFE/af_shell10

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  • Matrix group: Schenk_AFE
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  • download as a MATLAB mat-file, file size: 326 MB. Use UFget(1586) or UFget('Schenk_AFE/af_shell10') in MATLAB.
  • download in Matrix Market format, file size: 181 MB.
  • download in Rutherford/Boeing format, file size: 153 MB.

    Matrix properties
    number of rows1,508,065
    number of columns1,508,065
    nonzeros52,259,885
    structural full rank?yes
    structural rank1,508,065
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries412,440
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?no

    authorAutoForm Eng.
    editorO. Schenk
    date2006
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD476,466,992
    Cholesky flop count9.3e+11
    nnz(L+U), no partial pivoting, with AMD951,425,919
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD876,532,092
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD1,671,064,070

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 412440 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.