Re: Proving the: Simulating termination analyzer Principle

On 05/04/2025 22:31, dbush wrote:

On 4/5/2025 5:29 PM, olcott wrote:

On 4/5/2025 4:15 PM, dbush wrote:

On 4/5/2025 4:52 PM, olcott wrote:

*Simulating termination analyzer Principle*
It is always correct for any simulating termination
analyzer to stop simulating and reject any input that
would otherwise prevent its own termination.
>
void DDD()
{
    HHH(DDD);
    return;
}

>
Except when doing so would change the input, as is the case with HHH and DDD.
>
Changing the input is not allowed.

>
You may disagree that the above definition
of simulating termination analyzer is correct.
>
It is self-evident that HHH must stop simulating
DDD to prevent its own non-termination.
>

 Changing the input is not allowed.

You're right, but it doesn't matter very much as long as terminates() *always* gets the answer right for any arbitrary program tape and any data tape. Mr Olcott's fails to do that.
--
Richard Heathfield
Email: rjh at cpax dot org dot uk
"Usenet is a strange place" - dmr 29 July 1999
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