Matrix: Bai/cdde6

Description: MODEL CONVECTION-DIFFUSION DIFFERENTIAL EQUATIONS

Bai/cdde6 graph
(undirected graph drawing)


Bai/cdde6

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  • download as a MATLAB mat-file, file size: 8 KB. Use UFget(305) or UFget('Bai/cdde6') in MATLAB.
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    Matrix properties
    number of rows961
    number of columns961
    nonzeros4,681
    structural full rank?yes
    structural rank961
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetry 0%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorauthor unknown
    editorZ. Bai, D. Day, J. Demmel, J. Dongarra
    date1992
    kindsubsequent computational fluid dynamics problem
    2D/3D problem?yes

    Notes:

    next: - first: Bai/cdde1
    

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD10,917
    Cholesky flop count2.1e+05
    nnz(L+U), no partial pivoting, with AMD20,873
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD17,778
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD32,261

    SVD-based statistics:
    norm(A)7.7446
    min(svd(A))0.0437345
    cond(A)177.082
    rank(A)961
    sprank(A)-rank(A)0
    null space dimension0
    full numerical rank?yes

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

    Bai/cdde6 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.