| Deutsch English Français Italiano |
|
<vvqiap$g8ck$3@dont-email.me> View for Bookmarking (what is this?) Look up another Usenet article |
Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: Richard Heathfield <rjh@cpax.org.uk> Newsgroups: comp.theory Subject: =?UTF-8?Q?Re=3A_Flibble=E2=80=99s_Leap=3A_Why_Behavioral_Divergence?= =?UTF-8?Q?_Implies_a_Type_Distinction_in_the_Halting_Problem?= Date: Sun, 11 May 2025 17:13:13 +0100 Organization: Fix this later Lines: 22 Message-ID: <vvqiap$g8ck$3@dont-email.me> References: <vv1UP.77894$JJT6.54808@fx16.ams4> <vvqd4u$g8a1$1@dont-email.me> <7N2UP.527443$wBt6.464256@fx15.ams4> <vvqfgq$gmmk$1@dont-email.me> <os3UP.670056$BFJ.223954@fx13.ams4> <vvqgpt$gmmk$4@dont-email.me> <aG3UP.366972$wBVe.321504@fx06.ams4> <vvqhaj$gldn$6@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Sun, 11 May 2025 18:13:14 +0200 (CEST) Injection-Info: dont-email.me; posting-host="023cae9dc0d2c2b383f3d86e34fa8cd9"; logging-data="532884"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+hvenFYcaYbygkiC4lzUFpxuKB9zqTX6JisWedaoJyMg==" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:pQJ0/57vvqI5i5dIhR//AG0CoE8= Content-Language: en-GB In-Reply-To: <vvqhaj$gldn$6@dont-email.me> Bytes: 1978 On 11/05/2025 16:56, olcott wrote: > The directly executed DD() simply halts because > HHH has stopped the infinite recursion that it > specifies on its second recursive call. DD "simply halts". > DD emulated by HHH according to the rules of the > x86 language cannot possibly halt. Because all deciders > are required to report on what their finite string input > specifies HHH must reject DD as non-halting. DD "cannot possibly halt". Undecidability, thy name is DD. -- Richard Heathfield Email: rjh at cpax dot org dot uk "Usenet is a strange place" - dmr 29 July 1999 Sig line 4 vacant - apply within