• UF Sparse Matrix Collection
  • Matrix group: AMD
  • Click here for a description of the AMD group.
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  • Matrix: AMD/G3_circuit
  • Description: circuit simulation problem, Ufuk Okuyucu, AMD, Inc.
  • 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
  • download in Rutherford/Boeing format

    AMD/G3_circuit

    AMD/G3_circuit graph

    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
    entries not in dmperm blocks0
    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:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))189,102,138 99,386,898
    Cholesky flop count3.0e+11 6.2e+10
    nnz(L+U), no partial pivoting376,618,798 197,188,318
    nnz(V) for QR, upper bound nnz(L) for LU349,809,752 201,379,410
    nnz(R) for QR, upper bound nnz(U) for LU641,852,143 373,305,260

    Maintained by Tim Davis, last updated 04-May-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.