>From Robert Dodier:
>I think this is a general problem and Maxima should have a built-in
>function for it. How about if we call it "find".
I think that find should gives the elements that verify the predicate P and
not the positions of this elements (like in lisp), so i suggest that this be
called position (find-position, etc.).
Find should be like select in Mathematica.
Also: Gmane maxima doesn't work today (last message that appears is from
yesterday).