Construct a PDA that accepts { x#y  x, y in {a, b}* such that x ? y and xi = yi for some i, 1 = i = min(x, y) }. For your PDA to work correctly it will need to be nondetermin

what is regular expression?

proof of arden''s theoram

Since the signi?cance of the states represented by the nodes of these transition graphs is arbitrary, we will allow ourselves to use any ?nite set (such as {A,B,C,D,E, F,G,H} or ev

Trees and Graphs Overview: The problems for this assignment should be written up in a Mircosoft Word document. A scanned hand written file for the diagrams is also fine. Be

 Automaton theory, let G=(V,T,S,P) where V={a,b,A,B,S}, T={a,b},S the start ...
let G=(V,T,S,P) where V={a,b,A,B,S}, T={a,b},S the start symbol and P={S>Aba, A>BB, B>ab,AB>b} 1.show the derivation sentence for the string ababba 2. find a sentential form

The Equivalence Problem is the question of whether two languages are equal (in the sense of being the same set of strings). An instance is a pair of ?nite speci?cations of regular

Can you say that B is decidable? If you somehow know that A is decidable, what can you say about B?

Prepare the consolidated financial statements for the year ended 30 June 2011. On 1 July 2006, Mark Ltd acquired all the share capitall of john Ltd for $700,000. At the date , J

Suppose G = (N, Σ, P, S) is a reduced grammar (we can certainly reduce G if we haven't already). Our algorithm is as follows: 1. Define maxrhs(G) to be the maximum length of the
