From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: 103376,99e73f65ea2533b9 X-Google-Attributes: gid103376,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news2.google.com!news4.google.com!feeder1-2.proxad.net!proxad.net!feeder1-1.proxad.net!club-internet.fr!feedme-small.clubint.net!newsfeed.freenet.de!news2.euro.net!postnews2.euro.net!news.euronet.nl!not-for-mail From: "Karel Th�nissen" Newsgroups: comp.lang.ada References: <18b41828-bda4-4484-8884-ad62ce1c831d@f36g2000hsa.googlegroups.com> <57qdnfULQ9tzKCHVnZ2dnUVZ_tHinZ2d@comcast.com> <48bd0003$1@news.post.ch> <48bf90bf$0$30032$dbd4d001@news.euronet.nl> <1tm4gzcy6psv7$.xon8yk0ehqlf.dlg@40tude.net> Subject: Re: and then... (a curiosity) Date: Thu, 4 Sep 2008 21:59:16 +0200 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 X-RFC2646: Format=Flowed; Original Message-ID: <48c03e18$0$80906$dbd4f001@news.euronet.nl> Organization: EuroNet Internet NNTP-Posting-Date: 04 Sep 2008 19:59:20 GMT NNTP-Posting-Host: ht-c-98a0.mxs.adsl.euronet.nl X-Trace: 1220558360 dr4.euro.net 80906 62.234.184.160:3322 X-Complaints-To: abuse@euronet.nl Xref: g2news2.google.com comp.lang.ada:7652 Date: 2008-09-04T19:59:20+00:00 List-Id: schreef in bericht news:Pine.LNX.4.64.0809042128350.25707@medsec1.medien.uni-weimar.de... > On Thu, 4 Sep 2008, Dmitry A. Kazakov wrote: > >> "X/0 > 100 = T" means that neither is possible (contradiction). This >> "contradiction" is closer to an intuitive understanding of X/0 > 100, yet >> it is not the standard mathematical meaning of, which is that X/0 > 100 >> is >> not a formula at all. > > Well, "X/=0 and Y/X<100" is a common notation with a well-defined meaning, > even for X=0 (false, of course). On the other hand an isolated "Y/X<100" > only has a well-defined meaning if X/=0. No, the very fact that we have this discussion shows that it does not have a well-defined meaning in computing (outside Ada). And the meaning in two valued logic is well-defined, but a different beast. Claiming 'false of course' is retorics. And again, you propose a contextual interpretation of "Y/X<100" (for X=0). That is totally beyond what program analysis can achieve. > -- > ------ Stefan Lucks -- Bauhaus-University Weimar -- Germany ------ > Stefan dot Lucks at uni minus weimar dot de > ------ I love the taste of Cryptanalysis in the morning! ------ >