Matrix: Mallya/lhr71c

Description: Light hydrocarbon recovery, corrected version of LHR71

Mallya/lhr71c graph Mallya/lhr71c graph
(bipartite graph drawing) (graph drawing of A+A')

Mallya/lhr71c dmperm of Mallya/lhr71c
scc of Mallya/lhr71c

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  • Matrix group: Mallya
  • Click here for a description of the Mallya group.
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  • download as a MATLAB mat-file, file size: 10 MB. Use UFget(751) or UFget('Mallya/lhr71c') in MATLAB.
  • download in Matrix Market format, file size: 10 MB.
  • download in Rutherford/Boeing format, file size: 8 MB.

    Matrix properties
    number of rows70,304
    number of columns70,304
    nonzeros1,528,092
    structural full rank?yes
    structural rank70,304
    # of blocks from dmperm7,066
    # strongly connected comp.121
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorJ. Mallya
    editorT. Davis
    date1997
    kindchemical process simulation problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD137,644,638
    Cholesky flop count7.0e+11
    nnz(L+U), no partial pivoting, with AMD275,218,972
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD3,400,724
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD6,882,356

    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.