Matrix: Chen/pkustk11

Description: PKU SYMMETRIC STIFFNESS, COFFERDAM, FULL SIZE

Chen/pkustk11 graph
(undirected graph drawing)


Chen/pkustk11 dmperm of Chen/pkustk11

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: Chen
  • Click here for a description of the Chen group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups
  • download as a MATLAB mat-file, file size: 2 MB. Use UFget(857) or UFget('Chen/pkustk11') in MATLAB.
  • download in Matrix Market format, file size: 5 MB.
  • download in Rutherford/Boeing format, file size: 2 MB.

    Matrix properties
    number of rows87,804
    number of columns87,804
    nonzeros5,217,912
    structural full rank?yes
    structural rank87,804
    # of blocks from dmperm2
    # strongly connected comp.2
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typebinary
    structuresymmetric
    Cholesky candidate?yes
    positive definite?no

    authorP. Chen
    editorT. Davis
    date2002
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD43,083,342
    Cholesky flop count7.1e+10
    nnz(L+U), no partial pivoting, with AMD86,078,880
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD82,954,878
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD166,092,066

    For a description of the statistics displayed above, click here.

    Maintained by Tim Davis, last updated 12-Mar-2014.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.