Matrix: Schenk_ISEI/barrier2-3

Description: Olaf Schenk, Univ. Basel: Integrated Systems Eng., San Jose, semiconductor device

Schenk_ISEI/barrier2-3 graph
(undirected graph drawing)


Schenk_ISEI/barrier2-3

  • Home page of the UF Sparse Matrix Collection
  • Matrix group: Schenk_ISEI
  • Click here for a description of the Schenk_ISEI 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: 20 MB. Use UFget(966) or UFget('Schenk_ISEI/barrier2-3') in MATLAB.
  • download in Matrix Market format, file size: 23 MB.
  • download in Rutherford/Boeing format, file size: 20 MB.

    Matrix properties
    number of rows113,076
    number of columns113,076
    nonzeros2,129,496
    structural full rank?yes
    structural rank113,076
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries1,675,572
    nonzero pattern symmetrysymmetric
    numeric value symmetry 20%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorIntegrated Sys. Eng.
    editorO. Schenk
    date2003
    kindsubsequent semiconductor device problem
    2D/3D problem?yes

    Additional fieldssize and type
    bfull 113076-by-1

    Notes:

    next: Schenk_ISEI/barrier2-4 first: Schenk_ISEI/barrier2-1
    

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD131,339,665
    Cholesky flop count4.6e+11
    nnz(L+U), no partial pivoting, with AMD262,566,254
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD763,064,356
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD1,134,738,682

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1675572 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.