The domain of discourse for this problem is a group of three people who are working on a project. To make notation easier, the people are numbered 1, 2. 3. The predicate M(r, y) indicates whether x has sent an email to y, so M(2, 3) is read Person 2 has sent an email to person 3." The table below shows the value of the predicate M(r. y) for each (r, y) pair. The truth value in row r and column y gives the truth value for M(r. y). ALI Determine If the quantified statement is true or false. Justify your an- Swer. (a) VarVylr wl M(r. y)) (b) Vr3y M(x. y) (e) 3r vy M(r. y)
The domain of discourse for this problem is a group of three people who are working on a project. To make notation easier, the people are numbered 1, 2. 3. The predicate M(r, y) indicates whether x has sent an email to y, so M(2, 3) is read Person 2 has sent an email to person 3." The table below shows the value of the predicate M(r. y) for each (r, y) pair. The truth value in row r and column y gives the truth value for M(r. y). ALI Determine If the quantified statement is true or false. Justify your an- Swer. (a) VarVylr wl M(r. y)) (b) Vr3y M(x. y) (e) 3r vy M(r. 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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Transcribed Image Text:The domain of discourse for this problem is a group of three people who are
working on a project. To make notation easier, the people are numnbered 1, 2. 3.
The predicate M(r, y) indicates whether x has sent an email to v. so M(2, 3) is
read Person 2 has sent an email to person 3." The table below shows the value of
the predicate M(r. y) for each (r. yl pair. The truth value in row s and column
y gives the truth value for M(r. y).
17
3.
2.
彫
Determine if the quantified statenent is true or false. Justify your an-
Swer.
(a) VaVylr # wl M(x. yl)
(b) Vr 3g M(x. y)
(c) 3r Vy M(r. y)
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