Matrix: IBM_EDA/ckt11752_tr_0

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

IBM_EDA/ckt11752_tr_0 graph IBM_EDA/ckt11752_tr_0 graph
(bipartite graph drawing) (graph drawing of A+A')

IBM_EDA/ckt11752_tr_0 dmperm of IBM_EDA/ckt11752_tr_0

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  • Matrix group: IBM_EDA
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  • download as a MATLAB mat-file, file size: 2 MB. Use UFget(1414) or UFget('IBM_EDA/ckt11752_tr_0') 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
    structural full rank?yes
    structural rank49,702
    # of blocks from dmperm199
    # strongly connected comp.199
    explicit zero entries222
    nonzero pattern symmetry 98%
    numeric value symmetry 74%
    Cholesky candidate?no
    positive definite?no

    authorT. Lehner
    editorT. Davis
    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 AMD555,754
    Cholesky flop count1.8e+07
    nnz(L+U), no partial pivoting, with AMD1,061,806
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD22,848,490
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD39,830,843

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 222 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.