Answered: Using quantificational calculus and…

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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Using quantificational calculus and using at least 3 different variables, present an example of a well-formed closed formula and why

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Dear Student,

Quantificational calculus is a system of logic that allows for the quantification of variables in a formula. In order to be a well-formed closed formula, a quantificational formula must have all its quantifiers closed off. For example, the formula ∀x(Fx → Gx) is not a well-formed closed formula because the universal quantifier ∀x is not closed off. A well-formed closed formula would be (∀x)(Fx → Gx), where the universal quantifier ∀x is closed off by the parentheses.

Based on this a well-formed closed formula is given below -

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