Matrix: FEMLAB/waveguide3D

Description: Comsol, Inc. www.femlab.com : 3D waveguide problem

FEMLAB/waveguide3D graph
(undirected graph drawing)


FEMLAB/waveguide3D

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  • Matrix group: FEMLAB
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  • download as a MATLAB mat-file, file size: 3 MB. Use UFget(933) or UFget('FEMLAB/waveguide3D') in MATLAB.
  • download in Matrix Market format, file size: 4 MB.
  • download in Rutherford/Boeing format, file size: 4 MB.

    Matrix properties
    number of rows21,036
    number of columns21,036
    nonzeros303,468
    structural full rank?yes
    structural rank21,036
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetry 0%
    typecomplex
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorCOMSOL
    editorT. Davis
    date2003
    kindelectromagnetics problem
    2D/3D problem?yes

    Additional fieldssize and type
    bfull 21036-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD2,299,528
    Cholesky flop count5.6e+08
    nnz(L+U), no partial pivoting, with AMD4,578,020
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD4,619,201
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD9,113,391

    SVD-based statistics:
    norm(A)0.882885
    min(svd(A))8.64524e-05
    cond(A)10212.4
    rank(A)21,036
    sprank(A)-rank(A)0
    null space dimension0
    full numerical rank?yes

    singular values (MAT file):click here
    SVD method used:s = svd (full (R)) ; where [~,R,E] = spqr (A) with droptol of zero
    status:ok

    FEMLAB/waveguide3D 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.