[Scip] tailing off effect

[Gerald Gamrath]

Dear Shahin

please check out question 11 about column generation and
branch-and-price in the FAQ. http://scip.zib.de/#faq

You can stop pricing earlier and also supply a valid lower bound (e.g.,
the Lagrangean bound).

Best,
Gerald


On 17.04.2014 12:59, Shahin Gelareh wrote:
> sorry for the earlier message:
>
> Dear SCIPers
>
> I have a CG implementation for which there is a strong tailing off
> effect at the root node.
> Attached I draw the development of duals and objective function.
>
> I wonder if there is any way to get out of this situation ? any
> parameter setting etc. Any example, any possibility for aborting the
> generation of column and going to branching?
> I checked the SCIP mailing list history for similar question with no avail
>
> Cheers
> Shahin
>
>
>
>
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