(1) For each of the following languages, say whether it is context-free. If so, write a CFG or draw a PDA (non-mathematically) that generates the language. If not, prove it using the pumping lemma and/or closure properties for CFLS. (a) (b) (c) (d) L = {a"* | n > 0}. L = {a"b"c{m-n) | m >n} = {amb"cmn | m, n > 0} L = {a"b"cm | m > n}

(1) For each of the following languages, say whether it is context-free. If so, write a CFG or draw a PDA (non-mathematically) that generates the language. If not, prove it using the pumping lemma and/or closure properties for CFLS. (a) (b) (c) (d) L = {a"* | n > 0}. L = {a"b"c{m-n) | m >n} = {amb"cmn | m, n > 0} L = {a"b"cm | m > n}

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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