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

  • Matrix: HB/bcsstm02
  • Description: SYMMETRIC MASS MATRIX, SMALL OIL RIG, STATICALLY CONDENSED
  • download as a MATLAB mat-file, file size: 734 bytes. Use UFget(57) or UFget('HB/bcsstm02') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    HB/bcsstm02

    dmperm of HB/bcsstm02

    HB/bcsstm02 graph

    Matrix properties
    number of rows66
    number of columns66
    nonzeros66
    structural full rank?yes
    structural rank66
    # of blocks from dmperm66
    # strongly connected comp.66
    entries not in dmperm blocks0
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?yes

    authorJ. Lewis
    editorI. Duff, R. Grimes, J. Lewis
    date1982
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:AMD METIS DMPERM+
    nnz(chol(P*(A+A'+s*I)*P'))66 66 66
    Cholesky flop count6.6e+01 6.6e+01 6.6e+01
    nnz(L+U), no partial pivoting66 66 66
    nnz(V) for QR, upper bound nnz(L) for LU66 66 66
    nnz(R) for QR, upper bound nnz(U) for LU66 66 66

    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.