Matrix: Sandia/ASIC_680k

Description: Sandia, Xyce circuit simulation matrix (stripped)

Sandia/ASIC_680k graph
(undirected graph drawing)

Sandia/ASIC_680k dmperm of Sandia/ASIC_680k
scc of Sandia/ASIC_680k

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  • Matrix group: Sandia
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  • download as a MATLAB mat-file, file size: 8 MB. Use UFget(1419) or UFget('Sandia/ASIC_680k') in MATLAB.
  • download in Matrix Market format, file size: 16 MB.
  • download in Rutherford/Boeing format, file size: 11 MB.

    Matrix properties
    number of rows682,862
    number of columns682,862
    structural full rank?yes
    structural rank682,862
    # of blocks from dmperm583,921
    # strongly connected comp.583,523
    explicit zero entries1,232,776
    nonzero pattern symmetrysymmetric
    numeric value symmetry 0%
    Cholesky candidate?no
    positive definite?no

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

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD3,634,882
    Cholesky flop count5.1e+08
    nnz(L+U), no partial pivoting, with AMD6,586,902
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD31,135,581,080
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD233,125,921,419

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1232776 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.