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Suppose A = (Σ, T) is an SL2 automaton. Sketch an algorithm for recognizing L(A) by, in essence, implementing the automaton. Your algorithm should work with the particular automaton being given as a table of some sort, so that it can be easily generalized for the next part of the exercise. Your algorithm may halt as soon as it detects that the input is not in the language.
We represented SLk automata as Myhill graphs, directed graphs in which the nodes were labeled with (k-1)-factors of alphabet symbols (along with a node labeled ‘?' and one labeled
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Find the Regular Grammar for the following Regular Expression: a(a+b)*(ab*+ba*)b.
s-> AACD A-> aAb/e C->aC/a D-> aDa/bDb/e
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20*2
In Exercise 9 you showed that the recognition problem and universal recognition problem for SL2 are decidable. We can use the structure of Myhill graphs to show that other problems
automata of atm machine
Let L1 and L2 be CGF. We show that L1 ∩ L2 is CFG too. Let M1 be a decider for L1 and M2 be a decider for L2 . Consider a 2-tape TM M: "On input x: 1. copy x on the sec
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