Re: Invertible nondeterminism?

From: Sebastian Fischer <sebf_at_informatik.uni-kiel.de>
Date: Thu, 16 Dec 2010 23:19:13 +0900

On Thu, 2010-12-16 at 22:59 +0900, Sebastian Fischer wrote:
> So, for this construction to be useful, one should consider
> multiplicities of results such that (a ? a) is different from a.

This in turn conflicts with the law

    s (a ? b) = s a ? s b

because by using it together with the definition

    const x y = x

we can conclude:

    a = const a failure
      = const a (failure ? failure)
      = const a failure ? const a failure
      = a ? a

What a pity!

Sebastian

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Received on Do Dez 16 2010 - 15:39:13 CET

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