Matrix: DNVS/x104

Description: DNV-Ex 8 : SESAM test example no 104-1999-01-17

DNVS/x104 graph
(undirected graph drawing)


  • 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: 62 MB. Use UFget(1290) or UFget('DNVS/x104') in MATLAB.
  • download in Matrix Market format, file size: 50 MB.
  • download in Rutherford/Boeing format, file size: 41 MB.

    Matrix properties
    number of rows108,384
    number of columns108,384
    structural full rank?yes
    structural rank108,384
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries1,454,022
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    Cholesky candidate?yes
    positive definite?yes

    authorC. Damhaug
    editorJ. Koster
    kindstructural problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD21,833,283
    Cholesky flop count9.2e+09
    nnz(L+U), no partial pivoting, with AMD43,558,182
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD70,794,405
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD174,625,428

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1454022 explicit zero entries.

    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.