(a) L = {abc : 1 k = m or m ≤ k}. = u:

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
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12. Find context-free grammars for the following languages (with n ≥ 0, m ≥ 0,
k ≥ 0):
(a) L = {abck: n = m or m
(b) L= = {anfmck:
(c) L = {abck,k=n+m}.
(d)=30"b"
(e) L = {a¹bmck, k = n +2m}.
(f) L = {abck, k‡n+m}.
or m ≤ k}.
or m‡ k}.
: n = m
=HGH.
Transcribed Image Text:12. Find context-free grammars for the following languages (with n ≥ 0, m ≥ 0, k ≥ 0): (a) L = {abck: n = m or m (b) L= = {anfmck: (c) L = {abck,k=n+m}. (d)=30"b" (e) L = {a¹bmck, k = n +2m}. (f) L = {abck, k‡n+m}. or m ≤ k}. or m‡ k}. : n = m =HGH.
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