Matrix: Sanghavi/ecl32

Description: semiconductor device simulation matrix. Jagesh Sanghavi, UC Berkeley

Sanghavi/ecl32 graph Sanghavi/ecl32 graph
(bipartite graph drawing) (graph drawing of A+A')

Sanghavi/ecl32 dmperm of Sanghavi/ecl32

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  • download as a MATLAB mat-file, file size: 2 MB. Use UFget(983) or UFget('Sanghavi/ecl32') in MATLAB.
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    Matrix properties
    number of rows51,993
    number of columns51,993
    nonzeros380,415
    structural full rank?yes
    structural rank51,993
    # of blocks from dmperm9,653
    # strongly connected comp.9,653
    explicit zero entries0
    nonzero pattern symmetry 92%
    numeric value symmetry 60%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorJ. Sanghavi
    editorC. Voemel
    date2003
    kindsemiconductor device problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD20,590,045
    Cholesky flop count3.1e+10
    nnz(L+U), no partial pivoting, with AMD41,128,097
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD38,033,271
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD67,625,734

    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.