1: Prove the validity of the following sequents : a. (cAn) t, hA-s, hA-(s V c) pF(n A¬t) →p b. (s – p) V (t → q) E (s → q) V (t → p) C. vx (P(x) → (Q(x) V R(x))), - 3x (P(x) A R(x)) vx (P(x) → Q(x))
1: Prove the validity of the following sequents : a. (cAn) t, hA-s, hA-(s V c) pF(n A¬t) →p b. (s – p) V (t → q) E (s → q) V (t → p) C. vx (P(x) → (Q(x) V R(x))), - 3x (P(x) A R(x)) vx (P(x) → Q(x))
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:1: Prove the validity of the following sequents :
a. (cAn) → t, hA-s, hA-(s V c) pE (n A¬t) → p
b. (s – p) V (t → q) E (s → q) V (t → p)
C. vx (P(x) → (Q(x) V R(x))), – 3x (P(x) A R(x)) Fvx (P(x) → Q(x))
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