Matrix: Freescale/transient

Description: Small circuit from K. Gullapalli, Freescale Semiconductor

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

Freescale/transient dmperm of Freescale/transient
scc of Freescale/transient

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  • Matrix group: Freescale
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  • download as a MATLAB mat-file, file size: 6 MB. Use UFget(2275) or UFget('Freescale/transient') in MATLAB.
  • download in Matrix Market format, file size: 9 MB.
  • download in Rutherford/Boeing format, file size: 8 MB.

    Matrix properties
    number of rows178,866
    number of columns178,866
    structural full rank?yes
    structural rank178,866
    # of blocks from dmperm21
    # strongly connected comp.21
    explicit zero entries422
    nonzero pattern symmetry 100%
    numeric value symmetry 24%
    Cholesky candidate?no
    positive definite?no

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


    Small circuit from Kiran Gullapalli, Freescale Semiconductor       
    Factorization is fast, but dominates the transient simulation time.

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD1,092,205
    Cholesky flop count1.1e+08
    nnz(L+U), no partial pivoting, with AMD2,005,544
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD3,323,637,030
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD7,770,731,777

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 422 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.