Matrix: Vavasis/av41092

Description: AV41092, Steve Vavasis. Copy from Sherry Li (xiaoye@CS.Berkeley.EDU)

Vavasis/av41092 graph Vavasis/av41092 graph
(bipartite graph drawing) (graph drawing of A+A')

Vavasis/av41092 dmperm of Vavasis/av41092
scc of Vavasis/av41092

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  • Matrix group: Vavasis
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  • download as a MATLAB mat-file, file size: 10 MB. Use UFget(827) or UFget('Vavasis/av41092') in MATLAB.
  • download in Matrix Market format, file size: 16 MB.
  • download in Rutherford/Boeing format, file size: 13 MB.

    Matrix properties
    number of rows41,092
    number of columns41,092
    nonzeros1,683,902
    structural full rank?yes
    structural rank41,092
    # of blocks from dmperm4
    # strongly connected comp.4
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorS. Vavasis
    editorS. Li
    date1994
    kind2D/3D problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD177,903,033
    Cholesky flop count2.1e+12
    nnz(L+U), no partial pivoting, with AMD355,764,974
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD22,663,476
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD33,796,927

    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.