Lêt 6, V, 0 E Suppose & = V. Show thất (i) If 4 E 0, then ý = 0. (ii) If 0 = 4, then 0 = 4. (b) Determine whether the following logical consequence holds. Show your work. {q, (r → -p)} E (q ^ r)

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
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5.
(a) Let y, v, 0 E S(P). Suppose p = 4. Show that
(i) If o F 0, then v = 0.
(ii) If 0 E 4, then 0 = 4.
(b) Determine whether the following logical consequence holds. Show your work.
{q, (r → -p)} = (q ^ r)
Transcribed Image Text:5. (a) Let y, v, 0 E S(P). Suppose p = 4. Show that (i) If o F 0, then v = 0. (ii) If 0 E 4, then 0 = 4. (b) Determine whether the following logical consequence holds. Show your work. {q, (r → -p)} = (q ^ r)
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