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Let L = {w | w cannot be written as st#ts with s, t e {a, b}* }. Show that L is not regular.

Let L = {w | w cannot be written as st#ts with s, t e {a, b}* }. Show that L is not regular.

Database System Concepts
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
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Let L = { w | w cannot be written as st#ts with s, t  {a, b}* }. Show that L is not regular.

### Problem Statement Let \( L = \{ w \mid w \text{ cannot be written as } s \# t \# t s \text{ with } s, t \in \{a, b\}^* \} \). Show that \( L \) is not regular. **Explanation for Diagrams or Graphs:** None present in the given problem. This problem statement is purely textual and mathematical in nature. The task is to determine the regularity of the language \( L\).
Transcribed Image Text:### Problem Statement Let \( L = \{ w \mid w \text{ cannot be written as } s \# t \# t s \text{ with } s, t \in \{a, b\}^* \} \). Show that \( L \) is not regular. **Explanation for Diagrams or Graphs:** None present in the given problem. This problem statement is purely textual and mathematical in nature. The task is to determine the regularity of the language \( L\).
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