Matrix: Bai/dwg961a

Description: DISPERSIVE WAVEGUIDE STRUCTURES

Bai/dwg961a graph
(undirected graph drawing)


Bai/dwg961a dmperm of Bai/dwg961a
scc of Bai/dwg961a

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  • Matrix group: Bai
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  • download as a MATLAB mat-file, file size: 18 KB. Use UFget(1618) or UFget('Bai/dwg961a') in MATLAB.
  • download in Matrix Market format, file size: 13 KB.
  • download in Rutherford/Boeing format, file size: 13 KB.

    Matrix properties
    number of rows961
    number of columns961
    nonzeros3,405
    structural full rank?no
    structural rank705
    # of blocks from dmperm3
    # strongly connected comp.257
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetry 36%
    typecomplex
    structuresymmetric
    Cholesky candidate?no
    positive definite?no

    authorS. Gedney and U. Navasariwala
    editorZ. Bai, D. Day, J. Demmel, J. Dongarra
    date1996
    kindelectromagnetics problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD6,322
    Cholesky flop count7.5e+04
    nnz(L+U), no partial pivoting, with AMD11,683
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD9,262
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD17,679

    SVD-based statistics:
    norm(A)516674
    min(svd(A))0
    cond(A)Inf
    rank(A)705
    sprank(A)-rank(A)0
    null space dimension256
    full numerical rank?no
    singular value gapInf

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

    Bai/dwg961a 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.