Classify the languages below into the categories regular, context-free but not regular, or neither: 1. {w∈{a, b, c}∗ | na(w) = nb(w) = 2nc(w)} 2. {w∈{a, b} ∗ | na(w) + 3nb(w) ≡ 1 mod 4} 3. { uwuR | u, w∈ {a, b} ∗ and | na(w) = nb(w)}
Classify the languages below into the categories regular, context-free but not regular, or neither: 1. {w∈{a, b, c}∗ | na(w) = nb(w) = 2nc(w)} 2. {w∈{a, b} ∗ | na(w) + 3nb(w) ≡ 1 mod 4} 3. { uwuR | u, w∈ {a, b} ∗ and | na(w) = nb(w)}
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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Classify the languages below into the categories regular, context-free but not regular, or neither:
1. {w∈{a, b, c}∗ | na(w) = nb(w) = 2nc(w)}
2. {w∈{a, b} ∗ | na(w) + 3nb(w) ≡ 1 mod 4}
3. { uwuR | u, w∈ {a, b} ∗ and | na(w) = nb(w)}
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