Aug 21, 2021 · Recognizable means there is a Turing-machine that accepts all and only instances of that language. So that does not mean that if the input is not of that language, the machine …

Mar 8, 2011 · What is difference between "recognizable" and "decidable" in context of Turing machines?

Later, I have written a proof to show that Turing Recognizable languages are closed under union. I am supposed to identify why closing a Turing Recognizable language under some operation …

Nov 9, 2021 · Show the projection of decidable language is Turing-recognizable Ask Question Asked 4 years, 1 month ago Modified 4 years, 1 month ago

Apr 12, 2015 · I'm having an issue determining whether certain languages are decidable, recognizable or neither. The specific languages I'm referring to are of the following form L = …

Oct 31, 2017 · Here << denotes mapping reducibility. Show that if A A is Turing-recognizable and [Math Processing Error] A <A, then A A is decidable. How can I prove this? I'm not sure I quite …

Apr 12, 2021 · Recognizable vs Decidable I think I understand the definition of Turing-recognizable and Turing-decidable, but still there's few subtle details I did not catch so far. …

Recognizable languages are also called computably (or recursively) enumerable sets, and they can indeed be non-decidable. For example, the set of e e such that the e e th Turing machine …

Sep 28, 2019 · I'll answer your questions in order. First, what is a "simple" example of a language which is not Turing recognizable: If $\mathcal {H}$ is the halting problem, then I claim …

Dec 18, 2015 · I've searched tons of resources and while conceptually I understand the turing machine itself and what it does- I'm a bit stuck on Turing Recognizable and Turing Decidable …