Matrix: Schmid/thermal2

Description: unstructured FEM, steady state thermal problem. Dani Schmid, Univ. Oslo

Schmid/thermal2 graph
(undirected graph drawing)

Schmid/thermal2 dmperm of Schmid/thermal2

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  • download as a MATLAB mat-file, file size: 71 MB. Use UFget(1403) or UFget('Schmid/thermal2') in MATLAB.
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    Matrix properties
    number of rows1,228,045
    number of columns1,228,045
    structural full rank?yes
    structural rank1,228,045
    # of blocks from dmperm959
    # strongly connected comp.959
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    Cholesky candidate?yes
    positive definite?yes

    authorD. Schmid
    editorT. Davis
    kindthermal problem
    2D/3D problem?yes

    Additional fieldssize and type
    bfull 1228045-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD64,896,306
    Cholesky flop count2.8e+10
    nnz(L+U), no partial pivoting, with AMD128,564,567
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD135,142,876
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD250,322,077

    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.