Matrix: Chen/pkustk04

Description: PKU SYMMETRIC STIFFNESS, YUNSHAN PLAZA, DALIAN, CHINA

Chen/pkustk04 graph
(undirected graph drawing)

Chen/pkustk04

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  • Matrix group: Chen
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  • download as a MATLAB mat-file, file size: 2 MB. Use UFget(850) or UFget('Chen/pkustk04') in MATLAB.
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    Matrix properties
    number of rows55,590
    number of columns55,590
    nonzeros4,218,660
    structural full rank?yes
    structural rank55,590
    # 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 AMD11,783,226
    Cholesky flop count1.3e+10
    nnz(L+U), no partial pivoting, with AMD23,510,862
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD101,121,288
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD313,145,040

    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.