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

  • Matrix: MKS/fp
  • Description: 2-D Fokker Planck eqn, electron dyn. in external field. Dan Smith, MKS Inst.
  • download as a MATLAB mat-file, file size: 6 MB. Use UFget(1395) or UFget('MKS/fp') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    MKS/fp

    MKS/fp graph

    Matrix properties
    number of rows7,548
    number of columns7,548
    nonzeros834,222
    structural full rank?yes
    structural rank7,548
    # of blocks from dmperm1
    # strongly connected comp.1
    entries not in dmperm blocks0
    explicit zero entries14,331
    nonzero pattern symmetry 76%
    numeric value symmetry 0%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorD. Smith
    editorT. Davis
    date2006
    kindelectromagnetics problem
    2D/3D problem?yes

    Ordering statistics:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))1,441,448 1,507,157
    Cholesky flop count4.6e+08 4.9e+08
    nnz(L+U), no partial pivoting2,875,348 3,006,766
    nnz(V) for QR, upper bound nnz(L) for LU2,588,874 4,857,641
    nnz(R) for QR, upper bound nnz(U) for LU6,712,028 10,408,157

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 14331 explicit zero entries.

    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.