1: Prove the validity of the following sequents :a. (cAn) → t, hA-s, hA-(s V c) pE (n A¬t) → pb. (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))

Prove the validity of this sequent are as follows:

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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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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