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- Newsgroups: comp.lang.functional
- Path: sparky!uunet!wupost!cs.utexas.edu!torn!news.ccs.queensu.ca!qucis.queensu.ca!skill
- From: skill@qucis.queensu.ca (David Skillicorn)
- Subject: Polynomial functors (in categorical datatypes)
- Message-ID: <1992Jul22.165153.737@qucis.queensu.ca>
- Organization: Computing & Information Science, Queen's University
- Date: Wed, 22 Jul 1992 16:51:53 GMT
- Lines: 23
-
-
- I'm pretty sure that polynomial functors are not what's
- really needed to make Malcolm-style datatype constructions
- in BMF work. There's a paper from the group at Calgary
- (Cockett et al.) from which I gather that strength is
- the real property of importance. This can be arranged
- in several ways, one of which is to use a polynomial
- functor in a CCC. Some people (Bob Walters for one)
- would argue that this is the wrong setting, and prefer
- distributive categories.
-
- Anyway it seems possible to get the kind of benefits
- that the CDT construction gives without needing
- the polynomial restriction.
-
- But we're getting a bit far from the centre of this
- newsgroup.
-
- The Calgary work can be obtained by ftp from
- cpsc.ucalgary.ca in directory pub/charity/PAPERS.
-
- -david skillicorn
-
-