PLEASE ANSWER ASAP!! Let G1 = (V1,T1, S1, P1) and G2 = (V2, T2, S2, P2) be context-free grammars.Consider the grammar G = (V,T, S, P), where%3DV = VịU V, U{S} and S is a new start variable that is neither in Vị nor in V2T= T¡U T, andP contains all productions in P and P2 as well as the new productionsS → SS1|SS2|A,If G1 generates L1 and G2 generates L2, what is the language generated by G?O L̟L2O (LU L2)*L;U L;O LU L2

Answered: Image /qna-images/answer/805a35f3-6dac-4860-8b8a-51884aed2c93.jpg

Let G1 = (V1,T1, S1, P1) and G2 = (V2, T2, S2, P2) be context-free grammars. %3D Consider the grammar G = (V,T,S,P), where %3D V = Vị U V½ U{S} and S is a new start variable that is neither in Vị nor in V2 T = T¡U T2 and P contains all productions in P and P2 as well as the new productions S → SS1|SS2|A, If G1 generates L1 and G2 generates L2, what is the language generated by G?

Let G1 = (V1,T1, S1, P1) and G2 = (V2, T2, S2, P2) be context-free grammars. %3D Consider the grammar G = (V,T,S,P), where %3D V = Vị U V½ U{S} and S is a new start variable that is neither in Vị nor in V2 T = T¡U T2 and P contains all productions in P and P2 as well as the new productions S → SS1|SS2|A, If G1 generates L1 and G2 generates L2, what is the language generated by G?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Similar questions

Let ANTIPALINDROME be the language of all even-length strings over the alphabet {a,b} such that, for all i, the i-th letter from the start is different to the i-th letter from the end. Examples of strings in this language include: ε, ab, ba, aabb, abab, baba, bbaa, aaabbb, ... Give a Context-Free Grammar for the language ANTIPALINDROME.
Given the following CFG A → A+B A+ A-B A R R⇒ R/B R→ R*B Rarit B-> (A)|r|t a. Eliminate left recursion and backtracking and write the new grammar.. b. Write the FIRST and FOLLOW sets for A, B, and R.,
Consider a grammar for expressions is defined as follows:<assign> → <id> = <expr><id> → A | B | C | D<expr> → <id> + <expr>| <id> * <expr>| ( <expr> )| <id>Give a recursive descent algorithm for the BNF defined above.You may abstract away some details and are expected to make your answer using pseudo code.
Assumptions ... • Alphabet Σ = {a, b} . L₁= {ab n ≥ 0 An mod 3=0} L₂= {am: n ≥0^m≥ 0^n=m-1} ● . To do in this exercise ... Find a context-free grammar G such that L(G) = L₁ U L2. • Save your context-free grammar as a JFLAP .jff file, and submit that .jff file to Canvas as your solution to this exercise.
Context-free grammars are sometimes used to model natural languages. In this problem you will model a fragment of the English language using context-free grammars. Consider the following English sentences: The girl is pretty. The girl that the boy likes is pretty. The girl that the boy that the clerk pushed likes is pretty. The girl that the boy that the clerk that the girl knows pushed likes is pretty. This is a special type of sentence built from a subject (The girl), a relative pronoun (that) followed by another sentence, a verb (is) and an adjective (pretty). Give a context-free grammar G that models this special type of sentence. Your terminals should be words or sequences of words like pretty or the girl. Is the language of G regular? If so, write a regular expression for it. If not, prove using the pumping lemma for regular languages. Can you give an example of a sentence that is in G but does not make sense in common English?
Let G = (V. E. P, S) be a context-free grammar in which S only when n = 0. G is an LR(k) grammar (k ≥ 0) if (i) SaAw⇒ aßw, where a, ß € V*, we Σ*, R R (ii) Sα'A'w'α'B'w', where o', ß' = V*, w' e Σ*, and R (iii) the first aß + k symbols of aßw and a'B'w' coincide. Then α = α', A = A', B = B'.
For the grammar G with the productions:S -> a S b | c | S SGive a CNF G' such that L(G') = L(G) \ {ε}(remember: CNF allows only productions with the form "X -> Y Z" or "X -> a")
Given the following Regular Grammar (RG) StS zF F→ 2G|z G→tG|t Which of the following strings can be generated by it? i. tzz ii. ztt iii. ttzz iv. zztt O A. i, ii, and iii B. ii, iii, and iv O C. ii and iv O D. i and iii
What can be claimed about the grammar G: {S→ alaRb, R→ b|bSa }? OA. G is a context-free grammar and L(G) is a context-free language. B. G is a context-free grammar but L(G) is actually a regular language. O C. G is a regular grammar and L(G) is a regular language. What can be said about the grammar G: {S → ORO|OR1|1RO|1R1, R → E|OR|1R }? OA. G is a context-free grammar and L(G) is a context-free language. B. G is a context-free grammar but L(G) is the regular language (0+1)²(0+1)* C. G is a regular grammar and L(G) is the regular language (0+1)(0+1)*
"Introduction to Formal Languages and Automaton" by Peter Linz, 6th edition, 2017. The cut is from chapter 1, section 2, e 14.
1.
Draw the derivation tree corresponding to the derivation in Example 5.1.