Matrix: Averous/epb3

Description: Plate-fin heat exchanger (large case) (DAE)

Averous/epb3 graph Averous/epb3 graph
(bipartite graph drawing) (graph drawing of A+A')


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  • Matrix group: Averous
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  • download as a MATLAB mat-file, file size: 833 KB. Use UFget(290) or UFget('Averous/epb3') in MATLAB.
  • download in Matrix Market format, file size: 2 MB.
  • download in Rutherford/Boeing format, file size: 1 MB.

    Matrix properties
    number of rows84,617
    number of columns84,617
    structural full rank?yes
    structural rank84,617
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetry 67%
    numeric value symmetry 3%
    Cholesky candidate?no
    positive definite?no

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

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD2,555,409
    Cholesky flop count3.4e+08
    nnz(L+U), no partial pivoting, with AMD5,026,201
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD4,591,899
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD9,402,754

    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.