Matrix: AMD/G3_circuit

Description: circuit simulation problem, Ufuk Okuyucu, AMD, Inc.

AMD/G3_circuit graph
(undirected graph drawing)


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  • Matrix group: AMD
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  • download as a MATLAB mat-file, file size: 14 MB. Use UFget(1421) or UFget('AMD/G3_circuit') in MATLAB.
  • download in Matrix Market format, file size: 17 MB.
  • download in Rutherford/Boeing format, file size: 13 MB.

    Matrix properties
    number of rows1,585,478
    number of columns1,585,478
    structural full rank?yes
    structural rank1,585,478
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    Cholesky candidate?yes
    positive definite?yes

    authorU. Okuyucu
    editorT. Davis
    kindcircuit simulation problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD189,102,138
    Cholesky flop count3.0e+11
    nnz(L+U), no partial pivoting, with AMD376,618,798
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD349,809,752
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD641,852,143

    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.