From: Christian Lindig <lindig@cs.uni-sb.de>
To: Caml List <caml-list@inria.fr>
Subject: efficient binary relations?
Date: Fri, 31 Mar 2006 13:56:24 +0200 [thread overview]
Message-ID: <4120ea8c70420ccd2f670bd9e4433527@cs.uni-sb.de> (raw)
I am looking for an efficient representation of binary relations in
OCaml. I have used bitvectors in the past but would like to use a more
high-level and less imperative data structure.
The most important operation is the following. For a binary relation R
over \X x \Y compute for a set X the set X' = { y | (x,y) in R for all
x in X}. In other words, X' is the set of y that are common to all x in
X. Likewise, Y' must be computed. This operation requires to compute
the intersection of sets and was the main reason I chose bitvectors. If
you know about a suitable data structure I would glad to hear about it.
-- Christian
--
http://www.st.cs.uni-sb.de/~lindig/
next reply other threads:[~2006-03-31 11:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-31 11:56 Christian Lindig [this message]
2006-03-31 12:21 ` [Caml-list] " skaller
2006-03-31 12:42 ` Christian Lindig
2006-03-31 12:50 ` Sebastian Egner
2006-03-31 13:42 ` Christian Lindig
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