0 votes 0 votes 1) Why equality problem of CFG is undecidable? 2) Why emptiness problem of turing machine is undecidable? himgta asked Jul 25, 2018 • edited Jul 25, 2018 by himgta himgta 173 views answer comment Share Follow See 1 comment See all 1 1 comment reply Shaik Masthan commented Jul 25, 2018 reply Follow Share according to my analogy, emptiness means no string is accepted right? in Turing machine, some times while checking a string, it will go infinite loop, i mean halting problem is undecidable therefore emptiness also undecidable.. i am not sure on this, may someone can correct me. 0 votes 0 votes Please log in or register to add a comment.