Matrix: Sandia/adder_dcop_12

Description: Sandia/adder_dcop_12 circuit simulation matrix. Sandia National Lab.

Sandia/adder_dcop_12 graph Sandia/adder_dcop_12 graph
(bipartite graph drawing) (graph drawing of A+A')

Sandia/adder_dcop_12 dmperm of Sandia/adder_dcop_12
scc of Sandia/adder_dcop_12

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  • download as a MATLAB mat-file, file size: 90 KB. Use UFget(995) or UFget('Sandia/adder_dcop_12') in MATLAB.
  • download in Matrix Market format, file size: 113 KB.
  • download in Rutherford/Boeing format, file size: 102 KB.

    Matrix properties
    number of rows1,813
    number of columns1,813
    structural full rank?yes
    structural rank1,813
    # of blocks from dmperm469
    # strongly connected comp.6
    explicit zero entries0
    nonzero pattern symmetry 65%
    numeric value symmetry 0%
    Cholesky candidate?no
    positive definite?no

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


    next: Sandia/adder_dcop_13 first: Sandia/init_adder1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD12,432
    Cholesky flop count1.0e+05
    nnz(L+U), no partial pivoting, with AMD23,051
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD223,543
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD992,206

    SVD-based statistics:
    null space dimension0
    full numerical rank?yes

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

    Sandia/adder_dcop_12 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.