Construct an NFA model that represents the language by the regular expression: x(y ∪ (xy)∗)(x ∪ yy)∗xy

2. What should the pre-condition P be in each of the following correctness statements for the statement to be an instance of Hoare's assignment axiom scheme? (a) P { x (b) P { y = 1; } x 5 (c) P { i = i (d) P { i = i k; k; } For All (i=0; i 0 Exists (k=0%; k i

Compile Technology Just do 6.10 And example 6.14 also given coz you will need this to complete 6.10.

Can you please help me with question 2.7 part B because I am struggling with this problem that I just don't understand. Can you please do a state diagram for the push down automaton for part B. question for 2.7 2.7 Give informal English descriptions of PDAs for the language. B. The complement of the language {a^n b^n | n ≥ 0}

3. (a) Let Σ = {a, b}. Find a regular expression corresponding to the language L = {ba} ∗ ∪ {aa, bb}. (b) Let Σ = {0, 1}. Give the language corresponding to the regular expression 10∗ (0 +.

Give an unambiguous regular grammar for the regular expression: a(b∗d(c|a)∗)∗.

I keep getting the wrong answer can you please help me with this: Could you assist me with question 2.7 part C? I'm having difficulty with this problem and would greatly appreciate help in creating a state diagram for the push-down automaton in part C. question for 2.7 2.7 Give informal English descriptions of PDAs for the language. c. {w#x | w R is a substring of x for w, x ∈ {0,1} ∗ }

I'm facing significant difficulties with section 2.5 part B. Despite making several attempts, I'm unable to arrive at the correct solution. In order to address part B of section 2.5, I require the question from section 2.4. The problem involves pushdown automata, and it would greatly aid me if you could provide a visual representation demonstrating the steps you took to solve it. Attached is my incorrect answer for your review. Could you please assist me in identifying the errors in my approach? My focus is specifically on rectifying the issue with question 2.5 part B. question for 2.5 2.5 Give informal descriptions and state diagrams of pushdown automata for the languages in Exercise 2.4. question for 2.4 that you will need for 2.5 2.4 Give context-free grammars that generate the following languages. In all parts, the alphabet Σ is {0,1}. b. {w| w starts and ends with the same symbol}

Discrete Structures Section 1.2 Exercise Q9 and Q11. Show that each of the following conditional statements is a tautology using truth tables and without using truth tables.

Discrete Structure