Matrix: Bomhof/circuit_4

Description: Circuit DAE with BDF method & Newton. W. Bomhof, Univ. Utrecht

Bomhof/circuit_4 graph Bomhof/circuit_4 graph
(bipartite graph drawing) (graph drawing of A+A')

Bomhof/circuit_4 dmperm of Bomhof/circuit_4
scc of Bomhof/circuit_4

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  • download as a MATLAB mat-file, file size: 1 MB. Use UFget(373) or UFget('Bomhof/circuit_4') in MATLAB.
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    Matrix properties
    number of rows80,209
    number of columns80,209
    structural full rank?yes
    structural rank80,209
    # of blocks from dmperm28,005
    # strongly connected comp.27,923
    explicit zero entries0
    nonzero pattern symmetry 83%
    numeric value symmetry 36%
    Cholesky candidate?no
    positive definite?no

    authorW. Bomhof
    editorT. Davis
    kindcircuit simulation problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 80209-by-1
    xfull 80209-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD261,650
    Cholesky flop count2.8e+06
    nnz(L+U), no partial pivoting, with AMD443,091
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD192,660,331
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD319,417,713

    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.