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remove duplicates from a list
This function returns a list obtained by removing duplicates from L.
It used to be called
Set, but this is obsolescent for the
ambiguity with the command named
Set, Unset
for
setting panel options.
MakeSet([2,2,2,1,2,1,1,3,3]);
[2, 1, 3]
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WARNING: to test two sets for equality use the function
EqSet
instead of a normal equality test (because the latter yields false if the
elements are in a different order).