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On 4/28/2025 10:18 AM, dbush wrote:Category error. The mapping exists and has a correct answer in all cases, i.e. all algorithms either halt or do not halt when executed directly.On 4/28/2025 11:01 AM, olcott wrote:I have just proved that those requirements are stupidly wrongOn 4/28/2025 2:33 AM, Richard Heathfield wrote:>On 28/04/2025 07:46, Fred. Zwarts wrote:>
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>So we agree that no algorithm exists that can determine for all possible inputs whether the input specifies a program that (according to the semantics of the machine language) halts when directly executed.>
Correct?
Correct. We can, however, construct such an algorithm just as long as we can ignore any input we don't like the look of.
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The behavior of the direct execution of DD cannot be derived
by applying the finite string transformation rules specified
by the x86 language to the input to HHH(DD). This proves that
The assumption that an H exists that meets the below requirements is false, as shown by Linz and others:
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