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From: olcott <polcott333@gmail.com>
Newsgroups: comp.theory
Subject: Re: Defining a correct simulating halt decider
Date: Thu, 5 Sep 2024 08:24:20 -0500
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On 9/5/2024 2:34 AM, Mikko wrote:
> On 2024-09-03 13:00:50 +0000, olcott said:
> 
>> On 9/3/2024 5:25 AM, Mikko wrote:
>>> On 2024-09-02 16:38:03 +0000, olcott said:
>>>
>>>> A halt decider is a Turing machine that computes
>>>> the mapping from its finite string input to the
>>>> behavior that this finite string specifies.
>>>
>>> A halt decider needn't compute the full behaviour, only whether
>>> that behaviour is finite or infinite.
>>>
>>
>> void DDD()
>> {
>>    HHH(DDD);
>>    return;
>> }
>>
>> New slave_stack at:1038c4
>> Begin Local Halt Decider Simulation   Execution Trace Stored at:1138cc
>> [00002172][001138bc][001138c0] 55         push ebp      ; housekeeping
>> [00002173][001138bc][001138c0] 8bec       mov ebp,esp   ; housekeeping
>> [00002175][001138b8][00002172] 6872210000 push 00002172 ; push DDD
>> [0000217a][001138b4][0000217f] e853f4ffff call 000015d2 ; call HHH(DDD)
>> New slave_stack at:14e2ec
>> [00002172][0015e2e4][0015e2e8] 55         push ebp      ; housekeeping
>> [00002173][0015e2e4][0015e2e8] 8bec       mov ebp,esp   ; housekeeping
>> [00002175][0015e2e0][00002172] 6872210000 push 00002172 ; push DDD
>> [0000217a][0015e2dc][0000217f] e853f4ffff call 000015d2 ; call HHH(DDD)
>> Local Halt Decider: Infinite Recursion Detected Simulation Stopped
>>
>> Hence  HHH(DDD)==0 is correct
> 
> Nice to see that you don't disagree with what said.
> Unvortunately I can't agree with what you say.
> HHH terminates, 

> os DDD obviously terminates, too. No valid

DDD emulated by HHH never reaches it final halt state.
It looks like I have to repeat this 10,000 times before
anyone ever notices that I said it at least once.

_DDD()
[00002172] 55         push ebp      ; housekeeping
[00002173] 8bec       mov ebp,esp   ; housekeeping
[00002175] 6872210000 push 00002172 ; push DDD
[0000217a] e853f4ffff call 000015d2 ; call HHH(DDD)
[0000217f] 83c404     add esp,+04
[00002182] 5d         pop ebp
[00002183] c3         ret
Size in bytes:(0018) [00002183]

Show the details of how DDD emulated by HHH
reaches its own machine address 0000217f.

00002172, 00002173, 00002175, 0000217a calls HHH(DDD)
then
00002172, 00002173, 00002175, 0000217a calls HHH(DDD)...

> C interpretaion of allows DDD to continue forever after
> HHH jas terminated.
> 


-- 
Copyright 2024 Olcott "Talent hits a target no one else can hit; Genius
hits a target no one else can see." Arthur Schopenhauer