Matrix: Sandia/fpga_dcop_08

Description: Sandia/fpga_dcop_08 circuit simulation matrix. Sandia National Lab.

Sandia/fpga_dcop_08 graph Sandia/fpga_dcop_08 graph
(bipartite graph drawing) (graph drawing of A+A')


Sandia/fpga_dcop_08 dmperm of Sandia/fpga_dcop_08
scc of Sandia/fpga_dcop_08

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: Sandia
  • Click here for a description of the Sandia group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups
  • download as a MATLAB mat-file, file size: 44 KB. Use UFget(1062) or UFget('Sandia/fpga_dcop_08') in MATLAB.
  • download in Matrix Market format, file size: 61 KB.
  • download in Rutherford/Boeing format, file size: 55 KB.

    Matrix properties
    number of rows1,220
    number of columns1,220
    nonzeros5,888
    structural full rank?yes
    structural rank1,220
    # of blocks from dmperm189
    # strongly connected comp.34
    explicit zero entries0
    nonzero pattern symmetry 82%
    numeric value symmetry 34%
    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_09 first: Sandia/fpga_dcop_01
    

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD5,519
    Cholesky flop count2.7e+04
    nnz(L+U), no partial pivoting, with AMD9,818
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD10,430
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD26,636

    SVD-based statistics:
    norm(A)16.2674
    min(svd(A))6.66389e-13
    cond(A)2.44113e+13
    rank(A)1,210
    sprank(A)-rank(A)10
    null space dimension10
    full numerical rank?no
    singular value gap45.965

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

    Sandia/fpga_dcop_08 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.