Matrix: Sandia/fpga_dcop_05

Description: Sandia/fpga_dcop_05 circuit simulation matrix. Sandia National Lab.

Sandia/fpga_dcop_05 graph Sandia/fpga_dcop_05 graph
(bipartite graph drawing) (graph drawing of A+A')


Sandia/fpga_dcop_05 dmperm of Sandia/fpga_dcop_05
scc of Sandia/fpga_dcop_05

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  • download as a MATLAB mat-file, file size: 44 KB. Use UFget(1059) or UFget('Sandia/fpga_dcop_05') in MATLAB.
  • download in Matrix Market format, file size: 60 KB.
  • download in Rutherford/Boeing format, file size: 55 KB.

    Matrix properties
    number of rows1,220
    number of columns1,220
    nonzeros5,852
    structural full rank?yes
    structural rank1,220
    # of blocks from dmperm194
    # strongly connected comp.34
    explicit zero entries0
    nonzero pattern symmetry 82%
    numeric value symmetry 36%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorR. Hoekstra
    editorT. Davis
    date2003
    kindsubsequent circuit simulation problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 1220-by-1

    Notes:

    next: Sandia/fpga_dcop_06 first: Sandia/fpga_dcop_01
    

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD5,474
    Cholesky flop count2.7e+04
    nnz(L+U), no partial pivoting, with AMD9,728
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD10,313
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD26,669

    SVD-based statistics:
    norm(A)12.3423
    min(svd(A))6.66063e-13
    cond(A)1.85302e+13
    rank(A)1,206
    sprank(A)-rank(A)14
    null space dimension14
    full numerical rank?no
    singular value gap19.2399

    singular values (MAT file):click here
    SVD method used:s = svd (full (A)) ;
    status:ok

    Sandia/fpga_dcop_05 svd

    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.