Matrix: FEMLAB/sme3Dc

Description: Comsol, Inc. : 3D structural mechanics problem

FEMLAB/sme3Dc graph FEMLAB/sme3Dc graph
(bipartite graph drawing) (graph drawing of A+A')


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  • Matrix group: FEMLAB
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  • download as a MATLAB mat-file, file size: 29 MB. Use UFget(932) or UFget('FEMLAB/sme3Dc') in MATLAB.
  • download in Matrix Market format, file size: 41 MB.
  • download in Rutherford/Boeing format, file size: 38 MB.

    Matrix properties
    number of rows42,930
    number of columns42,930
    structural full rank?yes
    structural rank42,930
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetry 100%
    numeric value symmetry 44%
    Cholesky candidate?no
    positive definite?no

    editorT. Davis
    kindstructural problem
    2D/3D problem?yes

    Additional fieldssize and type
    bfull 42930-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD11,508,740
    Cholesky flop count5.6e+09
    nnz(L+U), no partial pivoting, with AMD22,974,550
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD20,325,633
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD52,854,984

    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.