computer science - Push Down Automanton-Computation -


i trying understand how pda works. in following diagram understand how transition functions work , how stack must updated. question have why start state accept state well? while pda l = {on1n | n ≥ 0}, means must not accept empty string. can 1 explain reason making start accept state, please?

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l = {0n1n | n ≥ 0}

when n=0, string is:

0010 = 0 0's followed 0 1's empty string. according definition, language l include empty string.

if not accept empty string, definition be:

l = {0n1n | n > 0}


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