• 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/bcsstm37
  • Description: MASS MATRIX, TRACK BALL
  • download as a MATLAB mat-file, file size: 87 KB. Use UFget(347) or UFget('Boeing/bcsstm37') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Boeing/bcsstm37

    dmperm of Boeing/bcsstm37

    scc of Boeing/bcsstm37

    Boeing/bcsstm37 graph

    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?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'))26,263 26,263
    Cholesky flop count2.8e+04 2.8e+04
    nnz(L+U), no partial pivoting27,023 27,023
    nnz(V) for QR, upper bound nnz(L) for LU26,421 26,509
    nnz(R) for QR, upper bound nnz(U) for LU26,746 26,746

    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.