Matrix: HB/dwt_512

Description: SYMMETRIC CONNECTION TABLE FROM DTNSRDC, WASHINGTON

HB/dwt_512 graph
(undirected graph drawing)


HB/dwt_512 dmperm of HB/dwt_512

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  • Matrix group: HB
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  • download as a MATLAB mat-file, file size: 4 KB. Use UFget(128) or UFget('HB/dwt_512') in MATLAB.
  • download in Matrix Market format, file size: 5 KB.
  • download in Rutherford/Boeing format, file size: 4 KB.

    Matrix properties
    number of rows512
    number of columns512
    nonzeros3,502
    structural full rank?yes
    structural rank512
    # of blocks from dmperm32
    # strongly connected comp.32
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typebinary
    structuresymmetric
    Cholesky candidate?yes
    positive definite?no

    authorG. Everstine, D. Taylor
    editorI. Duff, R. Grimes, J. Lewis
    date1980
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD3,759
    Cholesky flop count4.7e+04
    nnz(L+U), no partial pivoting, with AMD7,006
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD4,696
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD8,133

    SVD-based statistics:
    norm(A)11.384
    min(svd(A))0
    cond(A)Inf
    rank(A)477
    sprank(A)-rank(A)35
    null space dimension35
    full numerical rank?no
    singular value gap4.3133e+12

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

    HB/dwt_512 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.