On Tue, 27 Aug 2002, Yaron M. Minsky wrote:
> If the sets are really as dense as you say they are (on the order of 50%
> of all possible elements), then the fastest thing is probably just to
> use a bool array.  Such an approach would require 3 passes:   one to set
> all the elements of the array to false.  One to mark the elements
> corresponding to set 1 to true, and then one pass over set 2 to see
> which of its elements are shared by 1.

If this is what is needed, better take bit vectors ("bitv" - also on
Jean-Christophe's page).

Regards,
Markus Mottl

-- 
Markus Mottl                                             markus@oefai.at
Austrian Research Institute
for Artificial Intelligence                  http://www.oefai.at/~markus
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