Matrix: Grund/bayer01

Description: Unsymmetric Matrix bayer01, Bayer AG, F. Grund, Apr 1996.

Grund/bayer01 graph Grund/bayer01 graph
(bipartite graph drawing) (graph drawing of A+A')

Grund/bayer01 dmperm of Grund/bayer01

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: Grund
  • Click here for a description of the Grund group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups
  • download as a MATLAB mat-file, file size: 1 MB. Use UFget(452) or UFget('Grund/bayer01') in MATLAB.
  • download in Matrix Market format, file size: 2 MB.
  • download in Rutherford/Boeing format, file size: 2 MB.

    Matrix properties
    number of rows57,735
    number of columns57,735
    nonzeros275,094
    structural full rank?yes
    structural rank57,735
    # of blocks from dmperm9,133
    # strongly connected comp.1
    explicit zero entries2,680
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorBayer
    editorF. Grund
    date1997
    kindchemical process simulation problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD230,553,822
    Cholesky flop count3.1e+12
    nnz(L+U), no partial pivoting, with AMD461,049,909
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD762,409
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD1,565,498

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 2680 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.