Matrix: Mallya/lhr17c

Description: Light hydrocarbon recovery, corrected version of LHR17

Mallya/lhr17c graph Mallya/lhr17c graph
(bipartite graph drawing) (graph drawing of A+A')

Mallya/lhr17c dmperm of Mallya/lhr17c
scc of Mallya/lhr17c

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  • Matrix group: Mallya
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  • download as a MATLAB mat-file, file size: 3 MB. Use UFget(747) or UFget('Mallya/lhr17c') in MATLAB.
  • download in Matrix Market format, file size: 3 MB.
  • download in Rutherford/Boeing format, file size: 3 MB.

    Matrix properties
    number of rows17,576
    number of columns17,576
    structural full rank?yes
    structural rank17,576
    # of blocks from dmperm1,798
    # strongly connected comp.31
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    Cholesky candidate?no
    positive definite?no

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

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD33,835,914
    Cholesky flop count1.7e+11
    nnz(L+U), no partial pivoting, with AMD67,654,252
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD802,005
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD1,644,883

    SVD-based statistics:
    null space dimension4
    full numerical rank?no
    singular value gap2.43665

    singular values (MAT file):click here
    SVD method used:s = svd (full (A)) ;

    Mallya/lhr17c svd

    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.