Matrix: Lin/Lin

Description: Large sparse eigenvalue problem. Chun-hung (Martin) Lin

Lin/Lin graph
(undirected graph drawing)

Lin/Lin

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  • Matrix group: Lin
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  • download as a MATLAB mat-file, file size: 5 MB. Use UFget(1213) or UFget('Lin/Lin') in MATLAB.
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    Matrix properties
    number of rows256,000
    number of columns256,000
    nonzeros1,766,400
    structural full rank?yes
    structural rank256,000
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?no

    authorC. Lin
    editorT. Davis
    date2004
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD171,531,852
    Cholesky flop count7.3e+11
    nnz(L+U), no partial pivoting, with AMD342,807,704
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD399,966,806
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD705,014,796

    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.