Matrix: Hamm/hcircuit

Description: Steve Hamm, Motorola. Circuit w/no parasitics (Steve.Hamm@motorola.com)

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

Hamm/hcircuit dmperm of Hamm/hcircuit
scc of Hamm/hcircuit

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  • Matrix group: Hamm
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  • download as a MATLAB mat-file, file size: 2 MB. Use UFget(542) or UFget('Hamm/hcircuit') in MATLAB.
  • download in Matrix Market format, file size: 3 MB.
  • download in Rutherford/Boeing format, file size: 2 MB.

    Matrix properties
    number of rows105,676
    number of columns105,676
    nonzeros513,072
    structural full rank?yes
    structural rank105,676
    # of blocks from dmperm1,420
    # strongly connected comp.1,359
    explicit zero entries0
    nonzero pattern symmetry 100%
    numeric value symmetry 20%
    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 105676-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD368,316
    Cholesky flop count1.7e+06
    nnz(L+U), no partial pivoting, with AMD630,956
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD3,433,900
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD10,042,058

    Maintained by Tim Davis, last updated 01-Apr-2011.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.