The following predicate logic formulas is invalid: Vx, 3y.P(x,y) = 3y, Vx.P(x, y) Indicate which of the following are counter models for this formula and briefly explain your reasoning. 1. The predicate P(x,y) ::= y+x = 1 where the domain of discourse is N. 2. The predicate P(x,y) ::= y·x = 2 where the domain of discourse is R without 0. 3. The predicate P(x,y)::= yxy = x where the domain of discourse is the set of all binary strings, including the empty string 2.
The following predicate logic formulas is invalid: Vx, 3y.P(x,y) = 3y, Vx.P(x, y) Indicate which of the following are counter models for this formula and briefly explain your reasoning. 1. The predicate P(x,y) ::= y+x = 1 where the domain of discourse is N. 2. The predicate P(x,y) ::= y·x = 2 where the domain of discourse is R without 0. 3. The predicate P(x,y)::= yxy = x where the domain of discourse is the set of all binary strings, including the empty string 2.
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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Logic, set and relations. Discrete math using Latex
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According to the information given:-
We have to indicate the the predicate with logic formula on the instruction mention.
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