Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail
From: Antoon Pardon <antoon.pardon@rece.vub.ac.be>
Newsgroups: comp.lang.python
Subject: Re: Operator Precedence/Boolean Logic
Date: Thu, 23 Jun 2016 14:08:31 +0200
Lines: 17
Message-ID: <mailman.71.1466683753.11516.python-list@python.org>
References: <15997174-44d5-431c-8f90-a8d700921820@googlegroups.com> <56ecacd4-cc17-48ec-9830-57c8113d16f6@googlegroups.com> <YoudnV5Wro07zvbKnZ2dnUU7-b3NnZ2d@giganews.com> <3a840cef-24d2-4abb-8e5b-dc80bf48944d@googlegroups.com> <63fe7ea9-a14f-94a2-cdd5-27aa902fbf6b@online.de> <mailman.55.1466663422.11516.python-list@python.org> <576b8a41$0$2792$c3e8da3$76491128@news.astraweb.com> <576B9B33.2030903@rece.vub.ac.be> <mailman.57.1466669914.11516.python-list@python.org> <576ba258$0$11110$c3e8da3@news.astraweb.com> <576BAAAE.1090306@rece.vub.ac.be> <CAPTjJmrfiWrzRVGQwRP1LOduFDrfr+pmXzc4V0L3CN8jy65NEQ@mail.gmail.com> <576BD13F.3000505@rece.vub.ac.be>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-Trace: news.uni-berlin.de MgFaeYMC+Xx98bzf0PNdXwXTImJtmhKp/gbpnMMF/PFA==
Return-Path: <antoon.pardon@rece.vub.ac.be>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.027
X-Spam-Evidence: '*H*': 0.95; '*S*': 0.00; 'received:134': 0.05; '*is*': 0.09; 'integers': 0.09; 'itself.': 0.11; 'thu,': 0.15; '2016': 0.16; '23,': 0.16; 'received:ac.be': 0.16; 'received:io': 0.16; 'received:psf.io': 0.16; 'set,': 0.16; 'wrote:': 0.16; 'defined': 0.23; 'header:In-Reply-To:1': 0.24; 'header:User- Agent:1': 0.26; 'chris': 0.26; '*the': 0.29; 'subject:/': 0.30; 'received:be': 0.30; 'nothing.': 0.35; 'set.': 0.35; "isn't": 0.35; 'but': 0.36; 'to:addr:python-list': 0.36; 'pm,': 0.36; 'subject:: ': 0.37; 'being': 0.37; 'to:addr:python.org': 0.40; 'where': 0.40; 'angelico:': 0.84; 'of*': 0.84; 'pardon': 0.84; 'schreef': 0.84; 'sets,': 0.84; 'same,': 0.91
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: AsgMAHYeUleGuA9G/2dsb2JhbABehFsBMbxfhhICggABAQEBAQFmaA4Bg3YBAQQjVRELGAICBRYLAgIJAwIBAgFFEwYCAogrsU2NPoNbAQEIAiWBAYUmhE2FDII1glkBBJhFgVeMTYFTh2CFaY9SVINwbAGEJIVtAQEB
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Icedove/38.8.0
In-Reply-To: <CAPTjJmrfiWrzRVGQwRP1LOduFDrfr+pmXzc4V0L3CN8jy65NEQ@mail.gmail.com>
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
X-Mailman-Original-Message-ID: <576BD13F.3000505@rece.vub.ac.be>
X-Mailman-Original-References: <15997174-44d5-431c-8f90-a8d700921820@googlegroups.com> <56ecacd4-cc17-48ec-9830-57c8113d16f6@googlegroups.com> <YoudnV5Wro07zvbKnZ2dnUU7-b3NnZ2d@giganews.com> <3a840cef-24d2-4abb-8e5b-dc80bf48944d@googlegroups.com> <63fe7ea9-a14f-94a2-cdd5-27aa902fbf6b@online.de> <mailman.55.1466663422.11516.python-list@python.org> <576b8a41$0$2792$c3e8da3$76491128@news.astraweb.com> <576B9B33.2030903@rece.vub.ac.be> <mailman.57.1466669914.11516.python-list@python.org> <576ba258$0$11110$c3e8da3@news.astraweb.com> <576BAAAE.1090306@rece.vub.ac.be> <CAPTjJmrfiWrzRVGQwRP1LOduFDrfr+pmXzc4V0L3CN8jy65NEQ@mail.gmail.com>
Xref: csiph.com comp.lang.python:110410

Op 23-06-16 om 13:45 schreef Chris Angelico:
> On Thu, Jun 23, 2016 at 7:23 PM, Antoon Pardon
> <antoon.pardon@rece.vub.ac.be> wrote:
>> I don't care. In modern mathematics, zero is usaly defined as the
>> empty set. The empty set contains nothing, but it isn't nothing
>> itself. Otherwise the empty set would be the same as the set
>> containing the empty set, since they both would contain the same,
>> being nothing.
> Zero is *the cardinality of* the empty set. The set containing the
> empty set has a cardinality of 1.

In modern set theory where the integers are defined as specific kind
of sets, zero *is* the empty set.

-- 
Antoon.