Assuming the following predicates: • L(x, y): x is strictly less than y (x0); • D(x, y): x divides y exactly; determine which of the following formulae are true (in your answer include an expres- sion of the formula in concise (good) English without variables). (c) x €Z+. Vy € Z+. (G(x) → (P(y) ^ L(x, y)))
Assuming the following predicates: • L(x, y): x is strictly less than y (x0); • D(x, y): x divides y exactly; determine which of the following formulae are true (in your answer include an expres- sion of the formula in concise (good) English without variables). (c) x €Z+. Vy € Z+. (G(x) → (P(y) ^ L(x, y)))
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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Answer (c)
Transcribed Image Text:Assuming the following predicates:
L(x, y): x is strictly less than y (x<y);
• E(x): x is even;
• P(x): x is a prime number;
• EQ(x, y): x equals y (x=y);
• G(x): x is greater than zero (x>0);
• D(x, y): x divides y exactly;
●
determine which of the following formulae are true (in your answer include an expres-
sion of the formula in concise (good) English without variables).
(c) 3x € Z+. Vy € Z+. (G(x) → (P(y) ^ L(x, y)))
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