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- Path: sparky!uunet!charon.amdahl.com!pacbell.com!ames!agate!doc.ic.ac.uk!uknet!mucs!timc
- From: timc@cs.man.ac.uk (Tim Clement)
- Newsgroups: sci.logic
- Subject: Re: Programs for simple logic proofs: where are they?
- Keywords: Natural deduction, automatic theorem proving, Otter, HOL, Muffin
- Message-ID: <6776@m1.cs.man.ac.uk>
- Date: 17 Nov 92 14:18:26 GMT
- References: <4804@equinox.unr.edu> <1992Nov16.183210.9769@beaver.cs.washington.edu>
- Sender: news@cs.man.ac.uk
- Organization: Dept Computer Science, University of Manchester, U.K.
- Lines: 33
-
- In article <1992Nov16.183210.9769@beaver.cs.washington.edu> jon@cs.washington.edu (Jon Jacky) writes:
- >In article <4804@equinox.unr.edu> mjb@dws020.unr.edu (Mike Brown) writes:
- >>I am looking for programs that will do proofs like:
- >> Prove: Q \
- >> 1 P then Q Premis > The problem
- >> 2 P Premis /
- >> 3 Q 1, 2, Modus Ponens > The program's proof
- >>
- >>(The proofs do get more involved)
- >>
- >>Is there a program out there that will do these proofs?
- >
- >The nearest thing
- >I have read about is "Muffin: A Proof Assistant", a chapter by Richard C. Moore
- >in Jones and Shaw, CASE STUDIES IN SYSTEMATIC SOFTWARE DEVELOPMENT, Prentice
- >Hall International, 1990. I recall the chapter saying something about Muffin
- >being made available. I wonder if anyone is using it.
- >
-
- Muffin developed into "mural", a WIMP interface proof assistant for
- natural deduction proofs (i.e. proofs much like the example above).
- As a proof assistant, it leaves the user to decide that Modus Ponens
- is the rule to apply (although there are various forms of assistance
- for the choice). Full details are in "mural: a formal development
- support system" by C.B.Jones et al, Springer 1991. ISBN 3-540-19651-X.
-
- mural is generally available at modest cost. It is a large SmallTalk
- image, so can only be supplied to people with an appropriate SmallTalk
- license (hence no FTP). For details, contact richard@cs.man.ac.uk
- (non-educational users) or br@inf.rl.ac.uk (universities and similar
- bodies).
-
- Tim Clement
-