Matrix: Freescale/Freescale1

Description: circuit problem from K. Gullapalli, Freescale Semiconductor

Freescale/Freescale1 graph Freescale/Freescale1 graph
(bipartite graph drawing) (graph drawing of A+A')

Freescale/Freescale1 dmperm of Freescale/Freescale1

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  • Matrix group: Freescale
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  • download as a MATLAB mat-file, file size: 92 MB. Use UFget(2216) or UFget('Freescale/Freescale1') in MATLAB.
  • download in Matrix Market format, file size: 146 MB.
  • download in Rutherford/Boeing format, file size: 116 MB.

    Matrix properties
    number of rows3,428,755
    number of columns3,428,755
    nonzeros17,052,626
    structural full rank?yes
    structural rank3,428,755
    # of blocks from dmperm1,061
    # strongly connected comp.1,061
    explicit zero entries1,867,721
    nonzero pattern symmetry 91%
    numeric value symmetry 39%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorK. Gullapalli
    editorT. Davis
    date2008
    kindcircuit simulation problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD35,346,989
    Cholesky flop count9.9e+09
    nnz(L+U), no partial pivoting, with AMD67,265,223
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD61,283,799
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD116,519,652

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1867721 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.