Matrix: Simon/venkat01

Description: UNSTRUCTURED 2D EULER SOLVER, V. VENKATAKRISHNAN NASA, TIME STEP = 01

Simon/venkat01 graph
(undirected graph drawing)

Simon/venkat01

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  • Matrix group: Simon
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  • download as a MATLAB mat-file, file size: 14 MB. Use UFget(820) or UFget('Simon/venkat01') in MATLAB.
  • download in Matrix Market format, file size: 18 MB.
  • download in Rutherford/Boeing format, file size: 15 MB.

    Matrix properties
    number of rows62,424
    number of columns62,424
    nonzeros1,717,792
    structural full rank?yes
    structural rank62,424
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetry 6%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorV. Venkatakrishnan
    editorH. Simon
    date1993
    kindcomputational fluid dynamics problem sequence
    2D/3D problem?yes

    Additional fieldssize and type
    bfull 62424-by-1

    Notes:

    next: Simon/venkat25 first: Simon/venkat01

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD5,801,036
    Cholesky flop count1.1e+09
    nnz(L+U), no partial pivoting, with AMD11,539,648
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD10,610,700
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD20,928,396

    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.