Originally posted by: UDOPS

So, which of these is more efficient?

set = { elements | a in seta, b in setb, c in setc: a>x && b>y}
or

fixedset = {a| a in seta: a>x};

set = { elements | a in fixedset, b in setb, c in setc: b>y};

I imagine it depends on the way in which OPL filters sets and sequences the limiting conditions.
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#OPLusingCPLEXOptimizer