Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed2.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.117 X-Spam-Level: * X-Spam-Evidence: '*H*': 0.77; '*S*': 0.00; 'logic': 0.09; 'cc:addr :python-list': 0.11; 'loops': 0.16; 'somehow.': 0.16; 'subject:Programming': 0.16; 'wrote:': 0.18; 'memory': 0.22; 'cc:addr:python.org': 0.22; 'mon,': 0.24; 'cc:2**0': 0.24; "i've": 0.25; 'header:In-Reply-To:1': 0.27; 'dec': 0.30; 'strongly': 0.30; 'message-id:@mail.gmail.com': 0.30; "i'm": 0.30; 'url:mailman': 0.30; 'code': 0.31; 'high.': 0.31; 'url:python': 0.33; 'problem': 0.35; 'subject:with': 0.35; 'received:google.com': 0.35; 'url:listinfo': 0.36; 'url:org': 0.36; 'two': 0.37; 'feedback': 0.38; 'pm,': 0.38; 'space': 0.40; 'url:mail': 0.40; 'is.': 0.60; 'solve': 0.60; 'matter': 0.61; 'john': 0.61; 'ages': 0.84; 'circuit': 0.84; 'joel': 0.91; '2013': 0.98 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=p6MAd+dDi2QOm0Ll1lvBKj29lY0PTzWqsN8bx3MUelI=; b=Z94B+OeH78HhjLRoLbC8YV1/Lk0cpRKwN040NpE+8WE2QZBh4gi9zzDv6adnGThCRW MUPlHXzEovpRsFj1uoeq0VGKDvmKzwBg0apuhFMBwDLZ/Vc3edpcqKfd+L5qyGa65cev V2G9EdOVlsnmapTAfUQDkYiRAwB/6N0rGGkzL1Nzi57VoI4Rc7R64AZI7pzLk+Ql6z9b eIb/mF4cTLd9izWSpbbmpeQyoFhVYbhQje3ZIv1mNHmONRBjdFWGA/nojo8KdWASR/Ll u6Pd2DRRAFCT2dW7YHRRaZnJRgOn1KWjJklkYe/TT3coq2Sob5OkqnppRaVA226gkyqQ Y3rA== MIME-Version: 1.0 X-Received: by 10.53.10.34 with SMTP id dx2mr9974670vdd.13.1386621951693; Mon, 09 Dec 2013 12:45:51 -0800 (PST) In-Reply-To: References: Date: Mon, 9 Dec 2013 15:45:51 -0500 Subject: Re: Spoiler alert? (Re: Programming puzzle with boolean circuits) From: Joel Goldstick To: John Ladasky Content-Type: multipart/alternative; boundary=001a1134caf2de86aa04ed20141b Cc: "python-list@python.org" X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 60 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1386621959 news.xs4all.nl 2842 [2001:888:2000:d::a6]:55407 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:61414 --001a1134caf2de86aa04ed20141b Content-Type: text/plain; charset=UTF-8 On Mon, Dec 9, 2013 at 3:39 PM, John Ladasky wrote: > It has been ages since I've thought about logic gates, but... > > My thought is that with two NOT logic gates, you can only build a > flip-flop memory circuit. That strongly suggests to me that a memory > circuit would actually be used to solve the problem somehow. > > Two NOT gates plus as many AND and OR gates as you need. > I'm thinking that feedback loops would have to be involved, no matter what > the solution is. A need for feedback loops would make it very hard to > write code to look for the solution automatically. The dimensionality of > the search space will be high. > -- > https://mail.python.org/mailman/listinfo/python-list > -- Joel Goldstick http://joelgoldstick.com --001a1134caf2de86aa04ed20141b Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On Mon, Dec 9, 2013 at 3:39 PM, John Ladasky <jo= hn_ladasky@sbcglobal.net> wrote:
It has been ages since I've thought abou= t logic gates, but...

My thought is that with two NOT logic gates, you can only build a flip-flop= memory circuit. =C2=A0That strongly suggests to me that a memory circuit w= ould actually be used to solve the problem somehow.

Two NOT gates plus as many AND and OR gates as you ne= ed.
=C2=A0
I'm thinking that feedback loops would have to be involved, no matter w= hat the solution is. =C2=A0A need for feedback loops would make it very har= d to write code to look for the solution automatically. =C2=A0The dimension= ality of the search space will be high.
--
https://mail.python.org/mailman/listinfo/python-list



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