Question: Let = { 0 } . Prove or disprove that there exists an undecidable language over . To prove this statement, observe that there exists

Let

= {0} .

Prove or disprove that there exists an undecidable language over

.

To prove this statement, observe that there exists an undecidable unary language, since the number of unary languages is uncountable whereas the number of decidable languages is countably infinite! You need to know

(

understand and be able to prove

)

these facts.

Let ={0}. Prove or disprove that there exists an undecidable language

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