Matrix: AMD/G3_circuit

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

AMD/G3_circuit graph
(undirected graph drawing)

AMD/G3_circuit

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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
    nonzeros7,660,826
    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
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?yes

    authorU. Okuyucu
    editorT. Davis
    date2006
    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

    Maintained by Tim Davis, last updated 01-Apr-2011.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.