) Carefully explain why p ↔ q can be written as “p is necessary and sufficient for q”. ii) Verify the second part of De Morgan’s laws, ∼ (p∨q) ≡ (∼ p) ∧(∼ q), in two ways: (a) Explain it using conversational English, using your own particular examples of statements for p and q. (b) Use a truth table.
) Carefully explain why p ↔ q can be written as “p is necessary and sufficient for q”. ii) Verify the second part of De Morgan’s laws, ∼ (p∨q) ≡ (∼ p) ∧(∼ q), in two ways: (a) Explain it using conversational English, using your own particular examples of statements for p and q. (b) Use a truth table.
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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i) Carefully explain why p ↔ q can be written as “p is necessary and sufficient for q”.
ii) Verify the second part of De Morgan’s laws, ∼ (p∨q) ≡ (∼ p) ∧(∼ q), in two ways:
(a) Explain it using conversational English, using your own particular examples of statements for p and q.
(b) Use a truth table.
Expert Solution
Step 1
Set theory is the mathematical theory of well-defined collections, called sets, of objects or elements of sets called members. Therefore, the essence of set theory is the study of infinite sets, so real - as opposed to probability - can be defined as a mathematical theory of infinity.
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