Matrix: Boeing/bcsstm39

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

Boeing/bcsstm39 graph
(undirected graph drawing)

Boeing/bcsstm39 dmperm of Boeing/bcsstm39

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  • Matrix group: Boeing
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  • download as a MATLAB mat-file, file size: 143 KB. Use UFget(349) or UFget('Boeing/bcsstm39') in MATLAB.
  • download in Matrix Market format, file size: 215 KB.
  • download in Rutherford/Boeing format, file size: 215 KB.

    Matrix properties
    number of rows46,772
    number of columns46,772
    nonzeros46,772
    structural full rank?yes
    structural rank46,772
    # of blocks from dmperm46,772
    # strongly connected comp.46,772
    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 AMD46,772
    Cholesky flop count4.7e+04
    nnz(L+U), no partial pivoting, with AMD46,772
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD46,772
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD46,772

    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.