• UF Sparse Matrix Collection
  • Matrix group: Norris
  • Click here for a description of the Norris group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups

  • Matrix: Norris/fv1
  • Description: S.Norris, Univ. Auckland. FEM, Laplace eqn 2D 100x100 mesh
  • download as a MATLAB mat-file, file size: 79 KB. Use UFget(887) or UFget('Norris/fv1') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Norris/fv1

    Norris/fv1 graph

    Matrix properties
    number of rows9,604
    number of columns9,604
    nonzeros85,264
    structural full rank?yes
    structural rank9,604
    # of blocks from dmperm1
    # strongly connected comp.1
    entries not in dmperm blocks0
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?yes

    authorS. Norris
    editorT. Davis
    date2003
    kind2D/3D problem
    2D/3D problem?yes

    Ordering statistics:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))301,652 304,192
    Cholesky flop count2.0e+07 1.8e+07
    nnz(L+U), no partial pivoting593,700 598,780
    nnz(V) for QR, upper bound nnz(L) for LU511,375 476,044
    nnz(R) for QR, upper bound nnz(U) for LU956,152 890,419

    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.