2.47 Let = {0,1} and let B be the collection of strings that contain at least one 1 in their second half. In other words, B = {uvlue *, ve *1* and lul≥ v}. a. Give a PDA that recognizes B. b. Give a CFG that generates B.
2.47 Let = {0,1} and let B be the collection of strings that contain at least one 1 in their second half. In other words, B = {uvlue *, ve *1* and lul≥ v}. a. Give a PDA that recognizes B. b. Give a CFG that generates B.
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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Transcribed Image Text:2.47 Let = {0,1} and let B be the collection of strings that contain at least one 1 in
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their second half. In other words, B = {uv|ueΣ, ve Σ*12* and ul > lv|}.
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a. Give a PDA that recognizes B.
b. Give a CFG that generates B.
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