Matrix: Shyy/shyy161

Description: Wei Shyy, Univ. Florida. CFD/Navier-Stokes,viscous flow, fully coupled

Shyy/shyy161 graph Shyy/shyy161 graph
(bipartite graph drawing) (graph drawing of A+A')

Shyy/shyy161 dmperm of Shyy/shyy161
scc of Shyy/shyy161

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  • Matrix group: Shyy
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  • download as a MATLAB mat-file, file size: 2 MB. Use UFget(809) or UFget('Shyy/shyy161') in MATLAB.
  • download in Matrix Market format, file size: 2 MB.
  • download in Rutherford/Boeing format, file size: 2 MB.

    Matrix properties
    number of rows76,480
    number of columns76,480
    nonzeros329,762
    structural full rank?yes
    structural rank76,480
    # of blocks from dmperm25,761
    # strongly connected comp.321
    explicit zero entries0
    nonzero pattern symmetry 73%
    numeric value symmetry 18%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorW. Shyy
    editorT. Davis
    date1994
    kindcomputational fluid dynamics problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD2,371,970
    Cholesky flop count2.7e+08
    nnz(L+U), no partial pivoting, with AMD4,667,460
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD3,357,830
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD6,259,276

    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.