Matrix: CEMW/tmt_sym

Description: symmetric electromagnetics problem, David Isaak, Computational_EM_Works

CEMW/tmt_sym graph
(undirected graph drawing)


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  • Matrix group: CEMW
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  • download as a MATLAB mat-file, file size: 24 MB. Use UFget(1899) or UFget('CEMW/tmt_sym') in MATLAB.
  • download in Matrix Market format, file size: 28 MB.
  • download in Rutherford/Boeing format, file size: 26 MB.

    Matrix properties
    number of rows726,713
    number of columns726,713
    structural full rank?yes
    structural rank726,713
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    Cholesky candidate?yes
    positive definite?yes

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

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD40,988,516
    Cholesky flop count2.4e+10
    nnz(L+U), no partial pivoting, with AMD81,250,319
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD89,111,924
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD164,748,781

    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.