1994-07-20 - Re: Non-determinism forever. (was – Re: GUT and P=NP)

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From: Hal <hfinney@shell.portal.com>
To: cypherpunks@toad.com
Message Hash: d3097b39b453c9ef3b0affd900079d6ece7c6ad7c64f29172e7bcc458e90d9de
Message ID: <199407200447.VAA01776@jobe.shell.portal.com>
Reply To: N/A
UTC Datetime: 1994-07-20 23:35:02 UTC
Raw Date: Wed, 20 Jul 94 16:35:02 PDT

Raw message

From: Hal <hfinney@shell.portal.com>
Date: Wed, 20 Jul 94 16:35:02 PDT
To: cypherpunks@toad.com
Subject: Re: Non-determinism forever. (was -- Re: GUT and P=NP)
Message-ID: <199407200447.VAA01776@jobe.shell.portal.com>
MIME-Version: 1.0
Content-Type: text/plain


When I first heard about P and NP and such, I made a common mistake, one
which I think underlies a lot of the misconceptions people have.  I knew
that P meant "polynomial time" and understood pretty well what that meant,
but I mistakenly jumped to the conclusion that NP meant "non-polynomial
time", the complement of P.  It does not, of course; it means "nondeterministic
polynomial time" as others have described.  Basically, if you could _check_
an answer to a problem in polynomial time the problem is in NP, as others
have described here.

Hal





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