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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!att!allegra!alice!reeds
- From: reeds@alice.att.com (Jim Reeds)
- Newsgroups: comp.theory
- Subject: Re: P=NP; the proof
- Summary: Not!
- Keywords: Collapse of hierarchy
- Message-ID: <24563@alice.att.com>
- Date: 6 Jan 93 22:40:53 GMT
- Article-I.D.: alice.24563
- References: <1idr1nINNrl@nunki.anu.edu.au>
- Distribution: inet
- Organization: AT&T Bell Laboratories, Murray Hill NJ
- Lines: 20
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- Mike Robson writes
-
- > Who can shoot down this alleged proof that P=NP?
- [...]
- > Claim 2: If T is a solution to $LP$, it covers a permutation vector
- > $Q sub pi$.
-
- Maybe I can. The T matrix displayed in section 3 of Gismondi and Swart's
- isomorphism paper (sept 1992) covers no permutation vector. (There
- are only 24, so you can check by brute force, if you want.)
-
- Claim 2, if true, would imply that the feasible region for Robson's
- linear programming problem had precisely the set of permutation vectors
- as its extreme points. This is clearly out of step with the discussion
- in G&S section 3. I think G&S introduce their whole rigamarole of U vectors
- and actions of permutations on triples of symbols to get around this
- problem.
-
-