Matrix: Bai/rdb3200l

Description: REACTION-DIFFUSION BRUSSELATOR MODEL

Bai/rdb3200l graph
(undirected graph drawing)


Bai/rdb3200l

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  • Matrix group: Bai
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  • download as a MATLAB mat-file, file size: 30 KB. Use UFget(1633) or UFget('Bai/rdb3200l') in MATLAB.
  • download in Matrix Market format, file size: 64 KB.
  • download in Rutherford/Boeing format, file size: 36 KB.

    Matrix properties
    number of rows3,200
    number of columns3,200
    nonzeros18,880
    structural full rank?yes
    structural rank3,200
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetry 80%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorK. Meerbergen
    editorZ. Bai, D. Day, J. Demmel, J. Dongarra
    date1994
    kindcomputational fluid dynamics problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD76,728
    Cholesky flop count4.3e+06
    nnz(L+U), no partial pivoting, with AMD150,256
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD139,686
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD254,489

    SVD-based statistics:
    norm(A)111.573
    min(svd(A))0.100924
    cond(A)1105.52
    rank(A)3,200
    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/rdb3200l 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.