Matrix: Freescale/Freescale2

Description: circuit simulation matrix from Freescale

Freescale/Freescale2 graph Freescale/Freescale2 graph
(bipartite graph drawing) (graph drawing of A+A')


Freescale/Freescale2 dmperm of Freescale/Freescale2
scc of Freescale/Freescale2

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  • Matrix group: Freescale
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  • download as a MATLAB mat-file, file size: 112 MB. Use UFget(2662) or UFget('Freescale/Freescale2') in MATLAB.
  • download in Matrix Market format, file size: 126 MB.
  • download in Rutherford/Boeing format, file size: 104 MB.

    Matrix properties
    number of rows2,999,349
    number of columns2,999,349
    nonzeros14,313,235
    structural full rank?yes
    structural rank2,999,349
    # of blocks from dmperm608,917
    # strongly connected comp.608,915
    explicit zero entries8,729,442
    nonzero pattern symmetry 99%
    numeric value symmetry 56%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorK. Gullapalli
    editorT. Davis
    date2015
    kindcircuit simulation matrix
    2D/3D problem?no

    Notes:

    Circuit simulation matrix from Kiran Gullapalli, Freescale.
    This is a DC matrix with lots of explicit zero entries.    
    In subsequent iterations, many of the explicit zero entries
    become nonzero.                                            
    

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD14,805,384
    Cholesky flop count2.2e+08
    nnz(L+U), no partial pivoting, with AMD26,611,419
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD511,580,472
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD1,063,360,882

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 8729442 explicit zero entries.

    For a description of the statistics displayed above, click here.

    Maintained by Tim Davis, last updated 04-Jun-2015.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.