[Couenne] Dependency list dig_type

[Pietro Belotti]

Giacomo,

you should select STOP_AT_AUX if you are interested in direct dependence 
only. Looking at the Directed Acyclic Graph of the problem, STOP_AT_AUX 
gives you the forward star of a node. ORIG_ONLY builds a dependence list 
of originals only (as ultimately any auxiliary depends on originals), 
hence only returns the leaves of the DAG below the variable selected, 
while TAG_AND_RECURSIVE keeps a dependence list of both auxiliaries, and 
hence returns the whole subtree.

Hope this helps. Cheers,
Pietro

--
Pietro Belotti
Dept. of Mathematical Sciences
Clemson University
email: pbelott at clemson.edu
phone: 864-656-6765
web:   myweb.clemson.edu/~pbelott

On Fri, 18 Feb 2011, Giacomo Nannicini wrote:

> Hi all,
> can someone tell me what the values of the enumeration dig_type stand
> for? I have some intuition but I'd like to be sure.
> ORIG_ONLY
> STOP_AT_AUX
> TAG_AND_RECURSIVE
> COUNT
>
> I was looking for a way to check if a given variable i depends
> *directly* on another variable j, regardless of whether they are
> auxiliary vars or not.
>
> Thanks
>
> Giacomo
>
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