0 votes 0 votes Let $L_1$ and $L_2$ are two languages and both of them are accepted by DPDA. If $L=L_1-L_2$ is any languange , then what is the smallest language family $L'$ belongs to? GateAspirant999 asked Dec 26, 2017 • edited Dec 26, 2017 by GateAspirant999 GateAspirant999 324 views answer comment Share Follow See all 5 Comments See all 5 5 Comments reply Show 2 previous comments joshi_nitish commented Dec 26, 2017 reply Follow Share and what is L here ? 0 votes 0 votes GateAspirant999 commented Dec 26, 2017 reply Follow Share ok got the stupid mistake I did. Edited the question... 0 votes 0 votes joshi_nitish commented Dec 26, 2017 reply Follow Share yes, now its correct. smallest class L' can be is regular. L1 = {anbn |n>=1} //DCFL L2 = {anbn |n>=1} + b* //DCFL L = L1-L2 = $\phi$ L' = (a+b)* // regular 2 votes 2 votes Please log in or register to add a comment.