Composite objectives
Often we use a composite objective, built from two simple objectives A and B. Then we write A***B for the composite. The general meaning is: Take the winners under objective A, and apply objective B to them,
some examples from the shopping mall:
A B A***B
select all the red dresses the cheapest dress the cheapest red dress
the 10 cheapest dresses select all the red dresses red dresses among the 10 cheapest, if any
simply the best select all the prices the best together with its price
The first two examples show that A***B can be different from B***A.
The third example shows that objectives like select all the scores (rather than choosing one or a few) can make a lot of sense when combined with other objectives.
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