Matrix: IBM_EDA/ckt11752_dc_1

Description: Circuit simulation problem from R. Kimmel, IBM EDA

IBM_EDA/ckt11752_dc_1 graph IBM_EDA/ckt11752_dc_1 graph
(bipartite graph drawing) (graph drawing of A+A')

IBM_EDA/ckt11752_dc_1 dmperm of IBM_EDA/ckt11752_dc_1

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  • Matrix group: IBM_EDA
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  • download as a MATLAB mat-file, file size: 1 MB. Use UFget(1413) or UFget('IBM_EDA/ckt11752_dc_1') in MATLAB.
  • download in Matrix Market format, file size: 2 MB.
  • download in Rutherford/Boeing format, file size: 1 MB.

    Matrix properties
    number of rows49,702
    number of columns49,702
    nonzeros333,029
    structural full rank?yes
    structural rank49,702
    # of blocks from dmperm172
    # strongly connected comp.172
    explicit zero entries0
    nonzero pattern symmetry 98%
    numeric value symmetry 74%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorT. Lehner
    editorT. Davis
    date2006
    kindcircuit simulation problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 49702-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD565,749
    Cholesky flop count1.9e+07
    nnz(L+U), no partial pivoting, with AMD1,081,796
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD22,893,730
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD39,932,533

    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.