Matrix: Garon/garon2

Description: 2D FEM, Navier-Stokes, CFD. Square w/ inlet and outlet on opp. sides

Garon/garon2 graph
(undirected graph drawing)


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  • Matrix group: Garon
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  • download as a MATLAB mat-file, file size: 1 MB. Use UFget(445) or UFget('Garon/garon2') in MATLAB.
  • download in Matrix Market format, file size: 2 MB.
  • download in Rutherford/Boeing format, file size: 1 MB.

    Matrix properties
    number of rows13,535
    number of columns13,535
    structural full rank?yes
    structural rank13,535
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries17,372
    nonzero pattern symmetrysymmetric
    numeric value symmetry 67%
    Cholesky candidate?no
    positive definite?no

    authorA. Garon
    editorT. Davis
    kindcomputational fluid dynamics problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD1,190,950
    Cholesky flop count1.9e+08
    nnz(L+U), no partial pivoting, with AMD2,368,365
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD1,724,168
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD4,336,887

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 17372 explicit zero entries.

    SVD-based statistics:
    null space dimension0
    full numerical rank?yes

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

    Garon/garon2 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.