Matrix: Boeing/bcsstk36

Description: STIFFNESS MATRIX, AUTOMOBILE SHOCK ABSORBER ASSEMBLY

Boeing/bcsstk36 graph
(undirected graph drawing)


Boeing/bcsstk36

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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: 8 MB. Use UFget(341) or UFget('Boeing/bcsstk36') in MATLAB.
  • download in Matrix Market format, file size: 5 MB.
  • download in Rutherford/Boeing format, file size: 4 MB.

    Matrix properties
    number of rows23,052
    number of columns23,052
    nonzeros1,143,140
    structural full rank?yes
    structural rank23,052
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?yes

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

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD2,732,511
    Cholesky flop count6.2e+08
    nnz(L+U), no partial pivoting, with AMD5,441,970
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD7,616,171
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD15,718,121

    SVD-based statistics:
    norm(A)1.77539e+08
    min(svd(A))0.00023885
    cond(A)7.43309e+11
    rank(A)23,020
    sprank(A)-rank(A)32
    null space dimension32
    full numerical rank?no
    singular value gap1.02847

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

    Boeing/bcsstk36 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.