Matrix: Chen/pkustk03

Description: PKU SYMMETRIC STIFFNESS, SILOS IN WAREHOUSE

Chen/pkustk03 graph
(undirected graph drawing)

Chen/pkustk03

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  • Matrix group: Chen
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  • download as a MATLAB mat-file, file size: 1 MB. Use UFget(849) or UFget('Chen/pkustk03') in MATLAB.
  • download in Matrix Market format, file size: 3 MB.
  • download in Rutherford/Boeing format, file size: 954 KB.

    Matrix properties
    number of rows63,336
    number of columns63,336
    nonzeros3,130,416
    structural full rank?yes
    structural rank63,336
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typebinary
    structuresymmetric
    Cholesky candidate?yes
    positive definite?no

    authorP. Chen
    editorT. Davis
    date2002
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD8,671,128
    Cholesky flop count2.9e+09
    nnz(L+U), no partial pivoting, with AMD17,278,920
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD25,040,040
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD50,645,472

    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.