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

    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.