Path: csiph.com!news.mixmin.net!weretis.net!feeder4.news.weretis.net!ecngs!feeder2.ecngs.de!217.188.199.168.MISMATCH!takemy.news.telefonica.de!telefonica.de!newsfeed.xs4all.nl!newsfeed7.news.xs4all.nl!nzpost1.xs4all.net!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.018 X-Spam-Evidence: '*H*': 0.96; '*S*': 0.00; 'directions': 0.09; 'received:internal': 0.09; 'semantics': 0.09; 'python': 0.10; 'mathematics.': 0.16; 'message-id:@webmail.messagingengine.com': 0.16; 'received:10.202': 0.16; 'received:10.202.2': 0.16; 'received:66.111': 0.16; 'received:66.111.4': 0.16; 'received:messagingengine.com': 0.16; 'wrote:': 0.16; 'sep': 0.22; 'wrote': 0.23; "python's": 0.23; 'header:In-Reply-To:1': 0.24; "doesn't": 0.26; 'example': 0.26; 'fri,': 0.27; 'actual': 0.28; 'url:wikipedia': 0.29; 'url:wiki': 0.30; 'says': 0.32; 'could': 0.35; 'but': 0.36; 'url:org': 0.36; '(i.e.': 0.36; 'to:addr :python-list': 0.36; 'subject:: ': 0.37; 'received:10': 0.37; 'received:66': 0.38; 'url:en': 0.39; 'does': 0.39; 'to:addr:python.org': 0.40; 'header:Message-Id:1': 0.61; 'more': 0.63; 'different': 0.63; 'between': 0.65; 'article': 0.77; 'subject:True': 0.93 DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=fastmail.com; h= content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to:x-sasl-enc :x-sasl-enc; s=mesmtp; bh=ufJO6vabhX4Hjj/QOyCjJhEbucE=; b=GdeICS wImB82bvrrxN94bc28+GGtMvmIymhfzP5DvMAEYAGtyXGlJs0cR2K8wvrNy4FtjH 80zQc72eOXSUoG1kr0sQ55skCOppa3zHzQNNtAd27+XYBwXJRkeBtOdsW6p0T3zJ AJTBI9y/6OkYqWohLbZBkam+/InakE/36m5Hw= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d= messagingengine.com; h=content-transfer-encoding:content-type :date:from:in-reply-to:message-id:mime-version:references :subject:to:x-sasl-enc:x-sasl-enc; s=smtpout; bh=ufJO6vabhX4Hjj/ QOyCjJhEbucE=; b=Lh5A6L+UVQqRooYzSdvUPft8MXVt3qyvpLxgiujVTZQ8Rd5 VJ02vjhnPI/hmoUKetaH/eMTa90vCQTEr/yVFpD/FN12DhlNYD2rGbJS3ues/Bzh 1RQVVX7lA/9vUyhd3ayS3MyRranpwDS4eY3XmEYJBDcw9xH0p8M9O8mt3sGU= X-Sasl-Enc: RQx52Y+6gx3fAfzG3mhsEFlbiwVs5io5NqEgdUfWxPJd 1442611266 From: Random832 To: python-list@python.org MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain X-Mailer: MessagingEngine.com Webmail Interface - ajax-e92f8263 Subject: Re: True == 1 weirdness Date: Fri, 18 Sep 2015 17:21:06 -0400 In-Reply-To: References: <55fc0e4d$0$1645$c3e8da3$5496439d@news.astraweb.com> <1442583652.2433512.387297097.0C910B45@webmail.messagingengine.com> <1442603558.2508492.387585473.6851D82C@webmail.messagingengine.com> X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.20+ 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: 13 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1442611269 news.xs4all.nl 23763 [2001:888:2000:d::a6]:40059 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:96837 On Fri, Sep 18, 2015, at 17:13, Ian Kelly wrote: > Whoever wrote the Wikipedia article disagrees: > > https://en.wikipedia.org/wiki/Inequality_(mathematics)#Chained_notation > > Although the reference to Python leads one to suspect that this could > be based more on Python's semantics than on actual mathematics. Also, it says "different directions", but the provided example doesn't actually *show* different directions (i.e. mixing less-operators with greater-operators). The provided example "a < b = c <= d" does allow you to infer relationships between all participants: a < b, a < c, a < d, b = c, b <= d, c <= d.