Automata and Formal Language (chapter 4) pdf

... F and y ∈ L 2 q 1 q 2 b b Questions about RL 2. Is there an algorithm to determine whether or not a regular language is empty, finite, or infinite?. Yes. Right Quotient Let L 1 and L 2 be languages ... L 1 and y ∈ L 2 } Homomorphism (cont’d) If L is a language on Σ, then its homomorphic image is defined as: h(L) = {h(w): w ∈ L} Questions about RL 3. Given two regular languages L...

Ngày tải lên: 14/07/2014, 02:20

... ngôn ngữ hình thức. Hồ Văn Quân • An introduction to formal languages and automata. Peter Linz • Introduction to automata theory, languages, and computation. John Hopcroft & Jeffrey Ullman Automaton ... Language (cont’d) • Language: a subset L of Σ* • Sentence: a string in L • Example 1.3: In Example 1.2, L is a language on Σ, w is a string of Σ but not a sentence in L Fo...

Ngày tải lên: 14/07/2014, 02:20

... of the form: A → xB A → x A, B ∈ V and x ∈ T * Theorem 3.4 L is a regular language iff there exists a regular grammar G such that L = L(G). Regular Language and Regular Grammar Example 3.3 r ... Recalled • Formal grammar: G = (V, T, S, P) V: finite set of variables T: finite set of terminal symbols S∈V: start variable P: finite set of productions Equivalent Regular Expression r 1...

Ngày tải lên: 14/07/2014, 02:20

... (cont’d) Proof: • Draw the variable dependency graph for G 1 and find all variables that cannot be reached from S. • Remove those variables and the productions involving them. • Eliminate any terminal ... V 1 . • Reduce the length of the right sides of the productions: 1. Put all productions A → a and A → BC into P^. 2. Repeat until no more productions are added to P^: For each...

Ngày tải lên: 14/07/2014, 02:20

... erase A and move to q k if receiving a and at q j erase BC and move to q k At q i erase A and move to q k if receiving a and at q j erase B and move to q m and at q m erase C and move ... A and move to q k if receiving a and at q j erase B and move to q m and at q m erase C and move to q k (q i Aq k ) → a(q j Bq m )(q m Cq k ) 2 Pushdown Automata • There a...

Ngày tải lên: 14/07/2014, 02:20

... ngôn ngữ hình thức. Hồ Văn Quân • An introduction to formal languages and automata. Peter Linz • Introduction to automata theory, languages, and computation. John Hopcroft & Jeffrey Ullman Storage  A ... configuration Generated Language G = (V, T, S, P) L(G) = {w∈T* | S ⇒* w} • Example 1.8: Take into consideration the grammar given in Example 1.6: L(G) = {a n b n | n ≥ 0}...

Ngày tải lên: 13/05/2014, 10:21

... A.L., Strand, P., and Føyn, L., Levels of 99 Tc in seawater and biota samples from Norwegian coastal waters and adjacent seas, Mar. Pollut. Bull., 38, 560, 1999. 97. Bailly du Bois, P. and Guegueniat, ... Hague repro- cessing plant and conservative behaviour (1983, 1986, 1988, 19 94), Cont. Shelf Res., 19, 1977, 1999. 98. Sakuragi, Y., Meason, J.L., and Kuroda, P.K., Uranium and...

Ngày tải lên: 18/06/2014, 19:20

... Ab A → aAb A → λ 3 Formal Languages & Automata A formal language:  Is an abstraction of the general characteristics of programming languages.  Consists of a set of symbols and some formation ... trên. 15 Languages  Language concatenation: L1L2 = {xy | x∈L1, y∈L2} L n = L L L (n times) L 0 = {λ} 13 Languages  Language: a subset L of Σ *  Word or Sentence: a string in L...

Ngày tải lên: 11/07/2014, 19:20

... D.A. Rand and L.S. Young, Eds. Dynamical Systems and Turbulence, Warwick 1980, Lecture Notes in Mathematics Vol. 898. 1981, p. 230. Berlin: Springer-Verlag. [6] A.M. Fraser, ‘‘ Information and ... Palmer, R.A. Kropfli, and C.W. Fairall, ‘‘ Signature of Deterministic Chaos in Radar Sea Clutter and Ocean Surface Waves,’’ Chaos, 6, 613 – 616 (1995). [14] S. Haykin, R. Bakker, and B. C...

Ngày tải lên: 23/12/2013, 07:16

... participation. The BLM uses its land use planning process to protect and designate uses of public lands and resources. FLPMA requires the BLM to consider present and potential uses of public lands, apply principles ... resource projects (such as dams and levees), conversion of wetlands to uplands for farming and forestry, and lls for development projects such as housing, highwa...

Ngày tải lên: 18/06/2014, 19:20