New PDF release: An Introduction to Formal Languages and Automata (3rd

By Peter Linz

ISBN-10: 0763714224

ISBN-13: 9780763714222

An advent to Formal Languages and Automata presents a good presentation of the fabric that's necessary to an introductory thought of computation direction. The textual content was once designed to familiarize scholars with the principles and ideas of desktop technology and to bolster the students' skill to hold out formal and rigorous mathematical argument. utilizing a problem-solving process, the textual content offers scholars perception into the path fabric via stressing intuitive motivation and representation of principles via hassle-free reasons and reliable mathematical proofs. through emphasizing a studying via challenge fixing, scholars research the fabric essentially via problem-type illustrative examples that convey the incentive in the back of the innovations, in addition to their connection to the theorems and definitions.

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Extra resources for An Introduction to Formal Languages and Automata (3rd Edition)

Example text

W O 8 . Do yorr think Exercise 7 can be solvccl with fewer than three states'l ffi 9 . : n } I}. @ Wtli"tr of thc strings 00, 01001, 10010, 000, 0000 are arceptetl by the following rrfa? 54 Chopter ? \ 12. What is the complement of the language accepted by the nfa in Figure 2,10? 13. 8. Find an nfa that accepts I u {a5}. 14. 2. )fina an nfa that accepts {a}* and is such that if in its transition graph a single edge is removed (without any other changes), the resulting automaton accepts i") W 16.

If p e F and q fr F or vice versa, mark the pair (p, q) as distinguishable, 3. Repeat the following step until no previously unma,rked pairs are marked. F o r a l l p a i r s ( p , q ) a n d a l l a e X , c o m p u t e5 ( : p , o ) : p o a n d 6 ( q , a ) : eo. If the pair (po,eo) is nmrked as distinguishable, mark (p,q) as distinguishable. We claim that this procedure constitutes an algorithm for marking all disiinguishable pairs. The procedure nlurlr. applied to any dfa M : (8, E, 6,q0,F), terminates and determines all pairs of distinguishable states.

2. ')also corrtairrs q1' it true that ftrr arqynfa M : (Q,x,d,{o,F) the cornplcment of I(M) is 4 (DIs * @}? If Bo, prove it. II not' give a equal to thc set {u e X* : d* (qo,u) nF: J counterexample.. '? re that ftrr every nfa M : (Q, X, d, r7o,F) the complement of I (M) is ft? so,prove it; if not' give a r:outtterexantple. |. / \... o"* ttrat for every nfa with an arbitrary numbcr of final rtfates there is an eqrrivalent nfa with only one final state. Can we make a siurilar claim for clfh's'l ffi #) Firrd an nfa without ,\-trarrsitirrns and with a single firral state that accepts thc sct {a} u {b"' : n, > 1}.

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An Introduction to Formal Languages and Automata (3rd Edition) by Peter Linz

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