Matrix: Hamm/hcircuit

Description: Steve Hamm, Motorola. Circuit w/no parasitics (

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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  • download as a MATLAB mat-file, file size: 2 MB. Use UFget(542) or UFget('Hamm/hcircuit') in MATLAB.
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    Matrix properties
    number of rows105,676
    number of columns105,676
    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%
    Cholesky candidate?no
    positive definite?no

    authorS. Hamm
    editorT. Davis
    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

    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.