7 PLEASE EXPLAIN ALL STEPS11. (10 - medium) (PDA) Design PDA for L = {wcw“|uw e {a,b}*}.12. (5 - advanced) (Comprehensive). Working backwards, write a few steps for prov-ing the following theorem. Ideally, you can reach the step how the PDA is con-structed.Theorem. For every context free language L, there exists a push down automatonM, L is accepted by a PDA.A more “normal" statement is like "Every context free language is accepted by aPDA." You are expected to reformulate such statement into the statement abovewhere all logical symbols are explicit and which helps produce a proof (and thusthe statement is indeed true).

here we have given solution for question number 11 as per the guidelines. You can find the solution…

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11. (10 - medium) (PDA) Design PDA for L = {wcw“|w € {a,b}*}. %3D

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

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Concept explainers

Concept of memory addresses in pointers

The concept of pointers in high-level languages was introduced in C programming. Pointers are simply the variables that are used to store memory addresses of another variable. These special variables are generally used in the languages such as C Programming and C++ Programming, where it allows the programmer to work more deeply with memory and its addresses.

Question

PLEASE EXPLAIN ALL STEPS
11. (10 - medium) (PDA) Design PDA for L = {wcw“|uw e {a,b}*}.
12. (5 - advanced) (Comprehensive). Working backwards, write a few steps for prov-
ing the following theorem. Ideally, you can reach the step how the PDA is con-
structed.
Theorem. For every context free language L, there exists a push down automaton
M, L is accepted by a PDA.
A more “normal" statement is like "Every context free language is accepted by a
PDA." You are expected to reformulate such statement into the statement above
where all logical symbols are explicit and which helps produce a proof (and thus
the statement is indeed true).

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This is question 5 on the same chapter 9
Q5. According to legend, the monks in a remote mountain monastery knew how to predict when the world would end. They had a set of three diamond needles. Stacked on the first diamond needle were 5 gold disks of decreasing size. The monks moved one disk to another needle each hour subject to the following rules. (CO01) • Only one disk could be moved at a time. • A Larger disk must never be stacked above a smaller one. • One and One auxiliary needle could be used for the intermediate storage of disks. The legend said that when all 5 disks had been transferred to the destination needle, the stars would be extinguished and the world would end.Solve the above problem using recursion and draw a step by step procedure till the disks are transferred from source to destination.
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