Re: This function proves that only the outermost HHH examines the execution trace

On 7/27/2024 4:16 PM, Alan Mackenzie wrote:

olcott <polcott333@gmail.com> wrote:

On 7/27/2024 3:20 PM, Alan Mackenzie wrote:

olcott <polcott333@gmail.com> wrote:

On 7/27/2024 1:14 PM, Alan Mackenzie wrote:

olcott <polcott333@gmail.com> wrote:

 

Stopping running is not the same as halting.
DDD emulated by HHH stops running when its emulation has been aborted.
This is not the same as reaching its ret instruction and terminating
normally (AKA halting).

 

I think you're wrong, here.  All your C programs are a stand in for
turing machines.  A turing machine is either running or halted.  There is
no third state "aborted".

 

Until you take the conventional ideas of
(a) UTM
(b) TM Description
(c) Decider
and combine them together to become a simulating partial halt decider.

 

Where does the notion of "aborted", as being distinct from halted, come
from?

 

After all of these years and you don't get that?

 "Aborted" being distinct from halted is an incoherent notion.  It isn't
consistent with turing machines.  I was hoping you could give a
justification for it.
 

A simulating partial halt decider can stop simulating
its input when it detects a non-halting behavior pattern.
This does not count as the input halting.

 Says who?  Well, OK, it would be the machine halting, not the input, but
that's a small point.
 

void Infinite_Recursion()
{
   Infinite_Recursion();
}
_Infinite_Recursion()
[0000215a] 55         push ebp
[0000215b] 8bec       mov ebp,esp
[0000215d] e8f8ffffff call 0000215a ; recursive call
[00002162] 5d         pop ebp
[00002163] c3         ret
Size in bytes:(0010) [00002163]
Begin Local Halt Decider Simulation   Execution Trace Stored at:113934
[0000215a][00113924][00113928] 55         push ebp
[0000215b][00113924][00113928] 8bec       mov ebp,esp
[0000215d][00113920][00002162] e8f8ffffff call 0000215a
[0000215a][0011391c][00113924] 55         push ebp
[0000215b][0011391c][00113924] 8bec       mov ebp,esp
[0000215d][00113918][00002162] e8f8ffffff call 0000215a
Local Halt Decider: Infinite Recursion Detected Simulation Stopped
Do you understand that HHH(Infinite_Recursion) correctly
implements this criteria for the above input?
<MIT Professor Sipser agreed to ONLY these verbatim words 10/13/2022>
     If simulating halt decider H correctly simulates its input D
     until H correctly determines that its simulated D would never
     stop running unless aborted then
     H can abort its simulation of D and correctly report that D
     specifies a non-halting sequence of configurations.
</MIT Professor Sipser agreed to ONLY these verbatim words 10/13/2022>
If you can't understand that Infinite_Recursion() doesn't
halt then you don't know the subject matter nearly well enough.
--
Copyright 2024 Olcott "Talent hits a target no one else can hit; Genius
hits a target no one else can see." Arthur Schopenhauer