> I have a tiling problem that I've formulated as an ILP.
There is a more appropriate forum to discuss such things:
http://groups.google.com/group/sci.op-research/
Although, probably, some one on this list can help you.
> var x {p in POSITIONS, d in TILES, o in ORIENTATION} >= 0, <= 1,integer;
In MathProg you can use the keyword 'binary', i.e.
var x {p in POSITIONS, d in TILES, o in ORIENTATION}, binary;
> I couldn't find a way to say that a set was a union of a number of
> other sets. Is this possible, does it sound reasonable?
Yes, this is possible. For example:
set U := A union B union C;
> If I say that
> set T := a b c z
> set V := w x y z
> is the z in T and V the same if I use it as an index?
Yes, z is the same element in T and V.
Andrew Makhorin
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