1 votes 1 votes Is ((ab)*,+) closed or not closed? Theory of Computation theory-of-computation closure-property regular-language + – Kaustubh _15 asked Jul 5, 2017 Kaustubh _15 522 views answer comment Share Follow See all 3 Comments See all 3 3 Comments reply joshi_nitish commented Jul 5, 2017 reply Follow Share closed under which operation?? 0 votes 0 votes Kaustubh _15 commented Jul 5, 2017 reply Follow Share closed under binary operator - OR(+) ? 0 votes 0 votes joshi_nitish commented Jul 5, 2017 reply Follow Share regular languages are closed under union(+)... it will be (ab)* + (ab)* which is regular 1 votes 1 votes Please log in or register to add a comment.