0 votes 0 votes L1 and L2 Are Decidable. then L1 union L2 is (a)______ and L1 - L2 is(b) _________. a. Regular, cfl ,csl, rel. rec b. decidable, undecidable Theory of Computation theory-of-computation + – parthbkgadoya asked Feb 1, 2017 parthbkgadoya 246 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes If L1 and L2 are decidable then both the languages are recursive. And as recursive languages are closed under union L1 U L2 is also recursive. And L1 - L2 is also decidable. Kaushik.P.E answered Feb 1, 2017 Kaushik.P.E comment Share Follow See all 0 reply Please log in or register to add a comment.