• 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

  • Matrix: Chen/pkustk08
  • Description: PKU SYMMETRIC STIFFNESS, 11*11*11 MESH (21 NODES ELEMENT)
  • download as a MATLAB mat-file, file size: 2 MB. Use UFget(854) or UFget('Chen/pkustk08') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Chen/pkustk08

    Chen/pkustk08 graph

    Matrix properties
    number of rows22,209
    number of columns22,209
    nonzeros3,226,671
    structural full rank?yes
    structural rank22,209
    # of blocks from dmperm1
    # strongly connected comp.1
    entries not in dmperm blocks0
    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:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))14,680,191 11,144,163
    Cholesky flop count2.0e+10 9.6e+09
    nnz(L+U), no partial pivoting29,338,173 22,266,117
    nnz(V) for QR, upper bound nnz(L) for LU28,946,745 20,658,102
    nnz(R) for QR, upper bound nnz(U) for LU73,091,064 48,247,347

    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.