Matrix: Pothen/onera_dual

Description: onera_dual, with coordinates. From NASA, collected by Alex Pothen

Pothen/onera_dual graph
(undirected graph drawing)

Pothen/onera_dual graph

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: Pothen
  • Click here for a description of the Pothen 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(879) or UFget('Pothen/onera_dual') in MATLAB.
  • download in Matrix Market format, file size: 1 MB.
  • download in Rutherford/Boeing format, file size: 1 MB.

    Matrix properties
    number of rows85,567
    number of columns85,567
    structural full rank?yes
    structural rank85,567
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    Cholesky candidate?yes
    positive definite?no

    editorG. Kumfert, A. Pothen
    kindstructural problem
    2D/3D problem?yes

    Additional fieldssize and type
    coordfull 85567-by-3

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD10,520,808
    Cholesky flop count8.4e+09
    nnz(L+U), no partial pivoting, with AMD20,956,049
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD24,346,428
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD43,546,960

    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.