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Questions related to computability theory, a.k.a. recursion theory

0 votes
1 answer
87 views

Deteremine if $L = \{\langle M\rangle : L(M) \text{ consits of all words of prime length}\}$...

Deteremine if $L = \{\langle M\rangle : L(M) \text{ consits of all words of prime length}\}$ is in $R$ or in $RE\setminus R$ or not in $RE$ I am trying to prove that $L$ is not in $RE$ by reduction …
John D's user avatar
  • 125
1 vote
1 answer
53 views

Determine if for given some $L$, $S_L={L(M) : <M>\in L}$ then for any $L$, if $S_L=RE$ then ...

Determine if for given some $L$, $S_L=\{\ L(M) | <M>\in L \}$ then for any $L$, if $S_L=RE$ then $L\in R$. Correct or Incorrect and explain why. I think the claim is incorrect, and I'm trying to ex …
John D's user avatar
  • 125