Matrix: Sandia/ASIC_680ks

Description: Sandia, Xyce circuit simulation matrix (base)

Sandia/ASIC_680ks graph
(undirected graph drawing)

Sandia/ASIC_680ks dmperm of Sandia/ASIC_680ks

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  • Matrix group: Sandia
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  • download as a MATLAB mat-file, file size: 7 MB. Use UFget(1420) or UFget('Sandia/ASIC_680ks') in MATLAB.
  • download in Matrix Market format, file size: 12 MB.
  • download in Rutherford/Boeing format, file size: 9 MB.

    Matrix properties
    number of rows682,712
    number of columns682,712
    nonzeros1,693,767
    structural full rank?yes
    structural rank682,712
    # of blocks from dmperm583,771
    # strongly connected comp.583,771
    explicit zero entries635,409
    nonzero pattern symmetrysymmetric
    numeric value symmetry 1%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorR. Hoekstra
    editorT. Davis
    date2006
    kindcircuit simulation problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD2,819,942
    Cholesky flop count4.6e+08
    nnz(L+U), no partial pivoting, with AMD4,957,172
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD35,575,619
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD68,063,729

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 635409 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.