Matrix: DNVS/fcondp2

Description: Gould, Hu, & Scott: oil production platform from Christian Damhaug

DNVS/fcondp2 graph
(undirected graph drawing)

DNVS/fcondp2

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: DNVS
  • Click here for a description of the DNVS 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(1260) or UFget('DNVS/fcondp2') in MATLAB.
  • download in Matrix Market format, file size: 12 MB.
  • download in Rutherford/Boeing format, file size: 3 MB.

    Matrix properties
    number of rows201,822
    number of columns201,822
    nonzeros11,294,316
    structural full rank?yes
    structural rank201,822
    # 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

    authorC. Damhaug
    editorN. Gould, Y. Hu, J. Scott
    date2004
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD47,258,256
    Cholesky flop count4.5e+10
    nnz(L+U), no partial pivoting, with AMD94,314,690
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD177,655,683
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD321,624,876

    Maintained by Tim Davis, last updated 01-Apr-2011.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.