Matrix: Sandia/ASIC_320k

Description: Sandia, Xyce circuit simulation matrix (stripped)

Sandia/ASIC_320k graph
(undirected graph drawing)

Sandia/ASIC_320k dmperm of Sandia/ASIC_320k

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  • Matrix group: Sandia
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  • download as a MATLAB mat-file, file size: 6 MB. Use UFget(1417) or UFget('Sandia/ASIC_320k') in MATLAB.
  • download in Matrix Market format, file size: 11 MB.
  • download in Rutherford/Boeing format, file size: 7 MB.

    Matrix properties
    number of rows321,821
    number of columns321,821
    nonzeros1,931,828
    structural full rank?yes
    structural rank321,821
    # of blocks from dmperm399
    # strongly connected comp.1
    explicit zero entries703,536
    nonzero pattern symmetrysymmetric
    numeric value symmetry 36%
    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 AMD2,498,477
    Cholesky flop count5.1e+08
    nnz(L+U), no partial pivoting, with AMD4,675,133
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD14,764,994,557
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD42,860,082,547

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 703536 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.