Matrix: Hamm/scircuit

Description: Steve Hamm, Motorola. Circuit,many parasitics (Steve.Hamm@motorola.com)

Hamm/scircuit graph Hamm/scircuit graph
(bipartite graph drawing) (graph drawing of A+A')

Hamm/scircuit dmperm of Hamm/scircuit
scc of Hamm/scircuit

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  • Matrix group: Hamm
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  • download as a MATLAB mat-file, file size: 6 MB. Use UFget(544) or UFget('Hamm/scircuit') in MATLAB.
  • download in Matrix Market format, file size: 8 MB.
  • download in Rutherford/Boeing format, file size: 7 MB.

    Matrix properties
    number of rows170,998
    number of columns170,998
    nonzeros958,936
    structural full rank?yes
    structural rank170,998
    # of blocks from dmperm153
    # strongly connected comp.48
    explicit zero entries0
    nonzero pattern symmetry 100%
    numeric value symmetry 80%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorS. Hamm
    editorT. Davis
    date2001
    kindcircuit simulation problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 170998-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD1,241,108
    Cholesky flop count2.6e+07
    nnz(L+U), no partial pivoting, with AMD2,311,218
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD4,195,077
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD8,418,462

    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.