Matrix: UTEP/Dubcova3

Description: Univ. Texas at El Paso, from a PDE solver

UTEP/Dubcova3 graph
(undirected graph drawing)


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  • Matrix group: UTEP
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  • download as a MATLAB mat-file, file size: 14 MB. Use UFget(1849) or UFget('UTEP/Dubcova3') in MATLAB.
  • download in Matrix Market format, file size: 18 MB.
  • download in Rutherford/Boeing format, file size: 15 MB.

    Matrix properties
    number of rows146,689
    number of columns146,689
    structural full rank?yes
    structural rank146,689
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries6
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    Cholesky candidate?yes
    positive definite?yes

    authorL. Dubcova, J. Cerveny, and P. Solin
    editorT. Davis
    kind2D/3D problem
    2D/3D problem?yes

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD7,252,162
    Cholesky flop count1.4e+09
    nnz(L+U), no partial pivoting, with AMD14,357,635
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD27,382,360
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD89,360,545

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 6 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.