There is a language L such that L is not recursive (L is undecidable), yet L and its complement are both recursively enumerable.
因为英文水平太差，所以急需援助
面这道英文的题目，不知道能不能
，
在是理解不了： 题目：Consider the following statements: I.
There is a language L such that L is not recursive (L is undecidable), yet L and its complement are both recursively enumerable.
因为英文水平太差，所以急需援助面这道英文的题目，不知道能不能，在是理解不了： 题目：Consider the following statements: I.
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