Matrix: Boeing/bcsstk39

Description: SHUTTLE SOLID ROCKET BOOSTER, STIFFNESS MATRIX, E. PRAMONO, NASA AMES

Boeing/bcsstk39 graph
(undirected graph drawing)

Boeing/bcsstk39

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  • Matrix group: Boeing
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  • download as a MATLAB mat-file, file size: 7 MB. Use UFget(846) or UFget('Boeing/bcsstk39') in MATLAB.
  • download in Matrix Market format, file size: 6 MB.
  • download in Rutherford/Boeing format, file size: 5 MB.

    Matrix properties
    number of rows46,772
    number of columns46,772
    nonzeros2,060,662
    structural full rank?yes
    structural rank46,772
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries28,632
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?no

    authorR. Grimes
    editorT. Davis
    date2002
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD7,655,531
    Cholesky flop count2.2e+09
    nnz(L+U), no partial pivoting, with AMD15,264,290
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD11,206,745
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD22,229,800

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 28632 explicit zero entries.

    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.