Matrix: Chen/pkustk13

Description: PKY SYMMETRIC STIFFNESS, MACHINE ELEMENT

Chen/pkustk13 graph
(undirected graph drawing)

Chen/pkustk13

  • 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: 3 MB. Use UFget(859) or UFget('Chen/pkustk13') in MATLAB.
  • download in Matrix Market format, file size: 7 MB.
  • download in Rutherford/Boeing format, file size: 2 MB.

    Matrix properties
    number of rows94,893
    number of columns94,893
    nonzeros6,616,827
    structural full rank?yes
    structural rank94,893
    # of blocks from dmperm1
    # strongly connected comp.1
    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 AMD35,702,492
    Cholesky flop count4.0e+10
    nnz(L+U), no partial pivoting, with AMD71,310,091
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD77,525,840
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD215,417,632

    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.