UTM Theorem vs the identity function

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Sujet : UTM Theorem vs the identity function
De : tristan.wibberley+netnews2 (at) *nospam* alumni.manchester.ac.uk (Tristan Wibberley)
Groupes : comp.theory
Date : 21. Oct 2025, 17:35:50
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If the UTM Theorem states there's a u such that u(e,x) = f(x) where both
are defined and both are undefined when either is undefined, is that
interesting or surprising to anybody?

The identity function is valid for u and forces that e = f. Job done.

Am I missing something? Isn't it just trivially deducible from the
identity introduction axiom when you have it, which we assume when we
haven't fully formalised our discussion of computation.

--
Tristan Wibberley

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Date Sujet#  Auteur
21 Oct 25 * UTM Theorem vs the identity function12Tristan Wibberley
21 Oct 25 +* Re: UTM Theorem vs the identity function8Pierre Asselin
22 Oct 25 i`* Re: UTM Theorem vs the identity function7Tristan Wibberley
22 Oct 25 i +* Re: UTM Theorem vs the identity function3olcott
22 Oct 25 i i`* Re: UTM Theorem vs the identity function2Tristan Wibberley
22 Oct 25 i i `- Re: UTM Theorem vs the identity function --- Gödel1olcott
22 Oct 25 i `* Re: UTM Theorem vs the identity function3Pierre Asselin
23 Oct 25 i  `* Re: UTM Theorem vs the identity function2Tristan Wibberley
23 Oct 25 i   `- Re: UTM Theorem vs the identity function1Pierre Asselin
22 Oct 25 `* Re: UTM Theorem vs the identity function3Mikko
22 Oct 25  `* Re: UTM Theorem vs the identity function2Tristan Wibberley
23 Oct 25   `- Re: UTM Theorem vs the identity function1Mikko

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