Matrix: FIDAP/ex11

Description: TEST MATRIX FROM FIDAP: EX11.MAT

FIDAP/ex11 graph
(undirected graph drawing)


FIDAP/ex11

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: FIDAP
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  • download as a MATLAB mat-file, file size: 5 MB. Use UFget(409) or UFget('FIDAP/ex11') in MATLAB.
  • download in Matrix Market format, file size: 8 MB.
  • download in Rutherford/Boeing format, file size: 7 MB.

    Matrix properties
    number of rows16,614
    number of columns16,614
    nonzeros1,096,948
    structural full rank?yes
    structural rank16,614
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetry 100%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorA. Baggag, Y. Saad
    editorA. Baggag, Y. Saad
    date1994
    kindcomputational fluid dynamics problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD5,704,322
    Cholesky flop count3.0e+09
    nnz(L+U), no partial pivoting, with AMD11,392,030
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD7,343,038
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD13,987,342

    SVD-based statistics:
    norm(A)5.58628e+08
    min(svd(A))0.000194209
    cond(A)2.87642e+12
    rank(A)16,527
    sprank(A)-rank(A)87
    null space dimension87
    full numerical rank?no
    singular value gap1.00608

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

    FIDAP/ex11 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.