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Article View: comp.lang.functional
Article #305

Re: Primitive Recursive Arithmetic

#305
From: Frank Silbermann
Date: Thu, 14 Jun 1990 16:11
17 lines
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In article <15548@dime.cs.umass.edu> yodaiken@freal.cs.umass.edu (victor yodaiken) writes:
>>>>   But doesn't Primitive Recursive arithmetic 
>>>>   contain much too small a set of functions?  

>>>   Too small for what?  I do not understand why a programming language
>>>   would need to be able to expressive functions that are not feasible.  
>     What's an example of a function that is of real interest
>     and that cannot be  expressed cleanly as a p.r. function?

Could you write an interpreter for Horn clause logic programming
(which is semi-decidable) as a primitive recursive function?

On the otherhand, if you view primitive recursive functions
as adequate for general programming, you _could_ reply that
a Prolog interpreter is not of real interest!  :-)

	Frank Silbermann	fs@rex.cs.tulane.edu
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!cs.utexas.edu!mailrus!ames!rex!fs
From: fs@rex.cs.tulane.edu (Frank Silbermann)
Newsgroups: comp.lang.functional
Subject: Re: Primitive Recursive Arithmetic
Message-ID: <3594@rex.cs.tulane.edu>
Date: 14 Jun 90 16:11:01 GMT
References: <15421@dime.cs.umass.edu> <GUTTMAN.90Jun12105623@darjeeling.mitre.org> <15548@dime.cs.umass.edu>
Organization: Computer Science Dept., Tulane Univ., New Orleans, LA
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