Matrix: Boeing/bcsstm37

Description: MASS MATRIX, TRACK BALL

Boeing/bcsstm37 graph
(undirected graph drawing)

Boeing/bcsstm37 dmperm of Boeing/bcsstm37
scc of Boeing/bcsstm37

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  • Matrix group: Boeing
  • Click here for a description of the Boeing group.
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  • download as a MATLAB mat-file, file size: 87 KB. Use UFget(347) or UFget('Boeing/bcsstm37') in MATLAB.
  • download in Matrix Market format, file size: 103 KB.
  • download in Rutherford/Boeing format, file size: 115 KB.

    Matrix properties
    number of rows25,503
    number of columns25,503
    nonzeros15,525
    structural full rank?no
    structural rank14,005
    # of blocks from dmperm13,572
    # strongly connected comp.25,068
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?no
    positive definite?no

    authorR. Grimes
    editorT. Davis
    date1995
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD26,263
    Cholesky flop count2.8e+04
    nnz(L+U), no partial pivoting, with AMD27,023
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD26,421
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD26,746

    SVD-based statistics:
    norm(A)0.000117089
    min(svd(A))0
    cond(A)Inf
    rank(A)13,921
    sprank(A)-rank(A)84
    null space dimension11,582
    full numerical rank?no
    singular value gap1.14412

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

    Boeing/bcsstm37 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.