Matrix: CEMW/tmt_unsym

Description: unsymmetric electromagnetics problem, David Isaak, Computational_EM_Works

CEMW/tmt_unsym graph
(undirected graph drawing)

CEMW/tmt_unsym

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  • Matrix group: CEMW
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  • download as a MATLAB mat-file, file size: 32 MB. Use UFget(1898) or UFget('CEMW/tmt_unsym') in MATLAB.
  • download in Matrix Market format, file size: 46 MB.
  • download in Rutherford/Boeing format, file size: 43 MB.

    Matrix properties
    number of rows917,825
    number of columns917,825
    nonzeros4,584,801
    structural full rank?yes
    structural rank917,825
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetry 0%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorD. Isaak
    editorT. Davis
    date2008
    kindelectromagnetics problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD48,266,076
    Cholesky flop count3.2e+10
    nnz(L+U), no partial pivoting, with AMD95,614,327
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD100,343,680
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD182,025,388

    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.