[Scip] epsilon for functions isPositive, isZero, etc

[Alessia Violin]

Hello!

I was wondering which is the "epsilon" used in the functions 
SCIPisPosite, isZero, isEQ, etc? I tried to find this information in the 
developer's manual but I didn't succeed.

I have a branch-and-cut-and-price code with quite a lot of other things 
(stabilisation, heuristics, ...), and if the epsilon is too small the 
convergence of column generation is very slow, and if it's too big there 
are some particular configurations of parameters for which optimal 
columns are not generated. Moreover this also depends on the magnitude 
of the data for different set of instances and I am trying to figure out 
the best epsilon to use.

Thanks in advance!

Alessia


-- 
Alessia Violin
Service Graphes et Optimisation Mathématique (G.O.M.)
Université Libre de Bruxelles
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Email: aviolin at ulb.ac.be
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