Matrix: Mallya/lhr04c

Description: Light hydrocarbon recovery, corrected version of LHR04

Mallya/lhr04c graph Mallya/lhr04c graph
(bipartite graph drawing) (graph drawing of A+A')

Mallya/lhr04c dmperm of Mallya/lhr04c
scc of Mallya/lhr04c

  • Home page of the 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
  • download as a MATLAB mat-file, file size: 628 KB. Use UFget(737) or UFget('Mallya/lhr04c') in MATLAB.
  • download in Matrix Market format, file size: 757 KB.
  • download in Rutherford/Boeing format, file size: 647 KB.

    Matrix properties
    number of rows4,101
    number of columns4,101
    structural full rank?yes
    structural rank4,101
    # of blocks from dmperm439
    # strongly connected comp.31
    explicit zero entries0
    nonzero pattern symmetry 2%
    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 AMD1,839,299
    Cholesky flop count2.0e+09
    nnz(L+U), no partial pivoting, with AMD3,674,497
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD151,956
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD331,364

    SVD-based statistics:
    null space dimension1
    full numerical rank?no
    singular value gap211.301

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

    Mallya/lhr04c 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.