Matrix: Garon/garon1

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

Garon/garon1 graph
(undirected graph drawing)


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  • Matrix group: Garon
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  • download as a MATLAB mat-file, file size: 286 KB. Use UFget(444) or UFget('Garon/garon1') in MATLAB.
  • download in Matrix Market format, file size: 392 KB.
  • download in Rutherford/Boeing format, file size: 262 KB.

    Matrix properties
    number of rows3,175
    number of columns3,175
    structural full rank?yes
    structural rank3,175
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries4,204
    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 AMD184,873
    Cholesky flop count1.6e+07
    nnz(L+U), no partial pivoting, with AMD366,571
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD217,013
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD537,629

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4204 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/garon1 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.