• UF Sparse Matrix Collection
  • Matrix group: Mallya
  • Click here for a description of the Mallya group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups

  • Matrix: Mallya/lhr14c
  • Description: Light hydrocarbon recovery, corrected version of LHR14
  • download as a MATLAB mat-file, file size: 2 MB. Use UFget(745) or UFget('Mallya/lhr14c') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Mallya/lhr14c

    dmperm of Mallya/lhr14c

    scc of Mallya/lhr14c

    Mallya/lhr14c graph

    Matrix properties
    number of rows14,270
    number of columns14,270
    nonzeros307,858
    structural full rank?yes
    structural rank14,270
    # of blocks from dmperm1,556
    # strongly connected comp.31
    entries not in dmperm blocks19,599
    explicit zero entries0
    nonzero pattern symmetry 1%
    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:AMD METIS DMPERM+
    nnz(chol(P*(A+A'+s*I)*P'))20,564,513 15,397,494 651,822
    Cholesky flop count8.0e+10 3.5e+10 4.9e+07
    nnz(L+U), no partial pivoting41,114,756 30,780,718 1,308,973
    nnz(V) for QR, upper bound nnz(L) for LU633,737 714,613 411,960
    nnz(R) for QR, upper bound nnz(U) for LU1,310,622 1,568,067 942,748

    Maintained by Tim Davis, last updated 04-May-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.