• UF Sparse Matrix Collection
  • Matrix group: Boeing
  • Click here for a description of the Boeing group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups

  • Matrix: Boeing/bcsstm38
  • Description: MASS MATRIX, AIRPLANE ENGINE COMPONENT
  • download as a MATLAB mat-file, file size: 50 KB. Use UFget(348) or UFget('Boeing/bcsstm38') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Boeing/bcsstm38

    dmperm of Boeing/bcsstm38

    scc of Boeing/bcsstm38

    Boeing/bcsstm38 graph

    Matrix properties
    number of rows8,032
    number of columns8,032
    nonzeros10,485
    structural full rank?no
    structural rank5,199
    # of blocks from dmperm3,825
    # strongly connected comp.6,656
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?no

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

    Ordering statistics:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))10,771 10,771
    Cholesky flop count2.3e+04 2.3e+04
    nnz(L+U), no partial pivoting13,510 13,510
    nnz(V) for QR, upper bound nnz(L) for LU10,963 11,099
    nnz(R) for QR, upper bound nnz(U) for LU11,658 11,658

    Maintained by Tim Davis, last updated 04-May-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.