Matrix: Bai/ck104

Description: CHUCK MATRIX (MULTIPLE EIGENVALUES) J. CULLUM

Bai/ck104 graph
(undirected graph drawing)


Bai/ck104 dmperm of Bai/ck104

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  • download as a MATLAB mat-file, file size: 9 KB. Use UFget(306) or UFget('Bai/ck104') in MATLAB.
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  • download in Rutherford/Boeing format, file size: 11 KB.

    Matrix properties
    number of rows104
    number of columns104
    nonzeros992
    structural full rank?yes
    structural rank104
    # of blocks from dmperm2
    # strongly connected comp.2
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetry 0%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorJ. Cullum
    editorZ. Bai, D. Day, J. Demmel, J. Dongarra
    date1986
    kind2D/3D problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD548
    Cholesky flop count3.0e+03
    nnz(L+U), no partial pivoting, with AMD992
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD572
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD912

    SVD-based statistics:
    norm(A)5.73204
    min(svd(A))0.00104882
    cond(A)5465.24
    rank(A)104
    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/ck104 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.