Matrix: Bai/dw1024

Description: SQUARE DIELECTRIC WAVEGUIDE, H. DONG

Bai/dw1024 graph Bai/dw1024 graph
(bipartite graph drawing) (graph drawing of A+A')


Bai/dw1024

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  • Matrix group: Bai
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  • download as a MATLAB mat-file, file size: 32 KB. Use UFget(309) or UFget('Bai/dw1024') in MATLAB.
  • download in Matrix Market format, file size: 54 KB.
  • download in Rutherford/Boeing format, file size: 41 KB.

    Matrix properties
    number of rows2,048
    number of columns2,048
    nonzeros10,114
    structural full rank?yes
    structural rank2,048
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetry 98%
    numeric value symmetry 95%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorH. Dong
    editorZ. Bai, D. Day, J. Demmel, J. Dongarra
    date1993
    kindelectromagnetics problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD30,370
    Cholesky flop count1.1e+06
    nnz(L+U), no partial pivoting, with AMD58,692
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD45,515
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD82,538

    SVD-based statistics:
    norm(A)0.978805
    min(svd(A))0.00046761
    cond(A)2093.21
    rank(A)2,048
    sprank(A)-rank(A)0
    null space dimension0
    full numerical rank?yes

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

    Bai/dw1024 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.