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2 Theory of Computation Problems With Context-Free Languages and Nondeterministic Algorithm

1) Prove that the class of context-free languages is closed under concatenation. (If you do this by constructing a grammar, prove that the grammar works. That is, prove that it generates the language you want...

4 Theory of Computation Problems With Finite Automata

Problem 1
Given a FA M, is there a string that it accepts? (i.e. is L(M) =∅?)
Problem 2
Given two FA’s M1 and M2, are there any strings that are accepted by both?
Problem 3
Given two FA’s M1 and M2, is L(M1) a subset of L(M2)?
Problem 4
Given two FA’s M1 and M2, do they accept the same language? (FA equivalence)

Question about Transformation of a Left-Recursive Grammar Given in BNF Form

Transform the following left recursive BNF grammar into an equivalent non-left recursive grammar (S and A are nonterminal symbols; S is the start symbol; a and b are terminal symbols):
S --> aSb | bAS
A --> AbA | bAA | Aa | aAb

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