Matrix: Simon/raefsky5

Description: LANDING HYDROFOIL AIRPLANE FSE MODEL, ARTHUR RAEFSKY, CENTRIC ENG.

Simon/raefsky5 graph Simon/raefsky5 graph
(bipartite graph drawing) (graph drawing of A+A')


Simon/raefsky5 dmperm of Simon/raefsky5

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  • Matrix group: Simon
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  • download as a MATLAB mat-file, file size: 878 KB. Use UFget(818) or UFget('Simon/raefsky5') in MATLAB.
  • download in Matrix Market format, file size: 1 MB.
  • download in Rutherford/Boeing format, file size: 1 MB.

    Matrix properties
    number of rows6,316
    number of columns6,316
    nonzeros167,178
    structural full rank?yes
    structural rank6,316
    # of blocks from dmperm6,316
    # strongly connected comp.6,316
    explicit zero entries1,480
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorA. Raefsky
    editorH. Simon
    date1993
    kindstructural problem
    2D/3D problem?yes

    Additional fieldssize and type
    bfull 6316-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD871,032
    Cholesky flop count1.9e+08
    nnz(L+U), no partial pivoting, with AMD1,735,748
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD335,143
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD1,329,503

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1480 explicit zero entries.

    SVD-based statistics:
    norm(A)2.02494e+11
    min(svd(A))0.000522981
    cond(A)3.87192e+14
    rank(A)1,801
    sprank(A)-rank(A)4,515
    null space dimension4,515
    full numerical rank?no
    singular value gap1.00781

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

    Simon/raefsky5 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.