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

  • Matrix: Cunningham/k3plates
  • Description: FE stiffness matrix, 3 plates meeting at a line. A. Cunningham
  • download as a MATLAB mat-file, file size: 3 MB. Use UFget(842) or UFget('Cunningham/k3plates') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Cunningham/k3plates

    Cunningham/k3plates graph

    Matrix properties
    number of rows11,107
    number of columns11,107
    nonzeros378,927
    structural full rank?yes
    structural rank11,107
    # of blocks from dmperm1
    # strongly connected comp.1
    entries not in dmperm blocks0
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetry 100%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorA. Cunningham
    editorT. Davis
    date2002
    kindacoustics problem
    2D/3D problem?yes

    Ordering statistics:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))774,049 888,049
    Cholesky flop count8.2e+07 1.1e+08
    nnz(L+U), no partial pivoting1,536,991 1,764,991
    nnz(V) for QR, upper bound nnz(L) for LU1,152,498 1,378,141
    nnz(R) for QR, upper bound nnz(U) for LU2,342,542 2,621,098

    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.