Matrix: Chen/pkustk13

Description: PKY SYMMETRIC STIFFNESS, MACHINE ELEMENT

Chen/pkustk13 graph
(undirected graph drawing)

Chen/pkustk13

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  • Matrix group: Chen
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  • download as a MATLAB mat-file, file size: 3 MB. Use UFget(859) or UFget('Chen/pkustk13') in MATLAB.
  • download in Matrix Market format, file size: 7 MB.
  • download in Rutherford/Boeing format, file size: 2 MB.

    Matrix properties
    number of rows94,893
    number of columns94,893
    nonzeros6,616,827
    structural full rank?yes
    structural rank94,893
    # 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 AMD35,702,492
    Cholesky flop count4.0e+10
    nnz(L+U), no partial pivoting, with AMD71,310,091
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD77,525,840
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD215,417,632

    Maintained by Tim Davis, last updated 01-Apr-2011.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.