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- From: lwloen@rchland.vnet.ibm.com (Larry Loen)
- Subject: Re: Cryptography and P=NP
- Sender: news@rchland.ibm.com
- Message-ID: <1992Nov18.193900.20199@rchland.ibm.com>
- Date: Wed, 18 Nov 1992 19:39:00 GMT
- Distribution: inet
- Reply-To: lwloen@vnet.ibm.com
- Disclaimer: This posting represents the poster's views, not necessarily those of IBM
- References: <1992Nov15.110945.19939@ringer.cs.utsa.edu> <PHR.92Nov15203840@napa.telebit.com> <1e7fvdINN87s@iskut.ucs.ubc.ca> <1992Nov16.084503.10141@vax.oxford.ac.uk> <BxvEF3.Kqw.2@cs.cmu.edu>
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- In article <BxvEF3.Kqw.2@cs.cmu.edu> Jiri Sgall writes:
-
- >(partial quote of James Annan):
-
- >|> And remember, proving P=NP doesn't necessarily mean finding such an algorithm,
- >|> merely proving it exists.
- >|>
-
- >Once you have the proof, you can easily run a kind of universal algorithm,
- >which will be guaranteed to be polynomial
-
- OK, I don't know beans about P and NP. So, an elementary question:
-
- Do all programs of class P halt? Your "universal algorithm" seems perilously
- close to the "halting" problem and I have never been able to eliminate it
- from far simpler cases than P or NP. Or, is the halting issue kind of a
- separate point/issue (ie, the solution is "P" when it works)?
-
- --
- Larry W. Loen | My Opinions are decidedly my own, so please
- | do not attribute them to my employer
-