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- Newsgroups: ont.events
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- From: Kaizhong Zhang <kzhang@csd.uwo.ca>
- Subject: Reminder: Colloq. Wednesday, Nov. 18, 1992.
- Organization: Relayed-by-Sendmail
- Date: Tue, 17 Nov 1992 15:16:01 GMT
- Message-ID: <9211171516.AA00293@no26sun.csd.uwo.ca>
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- The University of Western Ontario
- Department of Computer Science
-
- COLLOQUIUM
-
- Speaker: David Rosenblueth
- Department of Computer Science
- UNAM, Mexico D.F., Mexico.
- Title: Magic sets with charts
- Time: Wednesday, November 18 1992, at 2:00pm
- Place: MC 320
- Abstract:
- Logic programs look like context-free grammars. This makes proof
- procedures for logic programs resemble parsers for context-free
- grammars. We exploit this resemblance to show that a well-known proof
- procedure for logic programs, called the ``magic-sets'' method, follows
- essentially the same principle as Earley's parser. Earley's parser
- builds parse trees in a top-down manner. There exist parsers similar
- to Earley's, that build parse trees in a bottom-up way. This suggests
- using a bottom-up version of Earley's parser to devise a new proof
- procedure for logic programs. We have developed one such procedure,
- which is an alternative to the magic-sets method.
-