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From: immibis <news@immibis.com>
Newsgroups: comp.theory
Subject: Re: Every D(D) simulated by H presents non-halting behavior to H ###
Date: Mon, 13 May 2024 07:29:33 +0200
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On 13/05/24 07:19, olcott wrote:
> On 5/12/2024 11:54 PM, immibis wrote:
>> On 10/05/24 19:55, Alan Mackenzie wrote:
>>> [ Followup-To: set ]
>>>
>>> In comp.theory olcott <polcott333@gmail.com> wrote:
>>>
>>> [ .... ]
>>>
>>> I've tried out your much spammed code on GCC (see below).  It is clear
>>> you have never built or run this code, which ironically can't reach Line
>>> 06.  It can't even reach line 00.
>>>
>>>> Richard tried to get away with D never simulated by H as an example
>>>> of D simulated by H:
>>>
>>>> Message-ID: <v0ummt$2qov3$2@i2pn2.org>
>>>> On 5/1/2024 7:28 PM, Richard Damon wrote:
>>>
>>>> *That people say they know I am wrong yet will not show the detailed*
>>>> *steps of how I am wrong indicates that they are probably liars*
>>>
>>> You have said, or at least implied that your code fragment is runnable.
>>> I think you are the liar, here.
>>>
>>>> 00 int H(ptr x, ptr x)  // ptr is pointer to int function
>>>> 01 int D(ptr x)
>>>> 02 {
>>>> 03   int Halt_Status = H(x, x);
>>>> 04   if (Halt_Status)
>>>> 05     HERE: goto HERE;
>>>> 06   return Halt_Status;
>>>> 07 }
>>>> 08
>>>> 09 int main()
>>>> 10 {
>>>> 11   H(D,D);
>>>> 12 }
>>>
>>>
>>> .  These are the diagnostics generated by GCC:
>>>
>> And the halting problem is about Turing machines, anyway.
> 
> It is sufficiently isomorphic to the Linz machines.

Linz is talking about Turing machines.