Matrix: Hollinger/mark3jac120

Description: Jacobian from MULTIMOD Mark3, oldstack 120

Hollinger/mark3jac120 graph Hollinger/mark3jac120 graph
(bipartite graph drawing) (graph drawing of A+A')

Hollinger/mark3jac120 dmperm of Hollinger/mark3jac120
scc of Hollinger/mark3jac120

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  • Matrix group: Hollinger
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  • download as a MATLAB mat-file, file size: 2 MB. Use UFget(590) or UFget('Hollinger/mark3jac120') in MATLAB.
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    Matrix properties
    number of rows54,929
    number of columns54,929
    nonzeros322,483
    structural full rank?yes
    structural rank54,929
    # of blocks from dmperm1,921
    # strongly connected comp.1,921
    explicit zero entries19,992
    nonzero pattern symmetry 7%
    numeric value symmetry 1%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorP. Hollinger
    editorT. Davis
    date2001
    kindeconomic problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD12,345,413
    Cholesky flop count1.2e+10
    nnz(L+U), no partial pivoting, with AMD24,635,897
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD22,957,596
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD42,888,151

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 19992 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.