Write a propositional formula y with variables p, q,r in the conjunctive normal form that has exactly the following three models (i.e. satisfying assignments) v1, V2, V3: Vị 1 1 1 V2 1 V3 1 1 Let v denote the formula ¬q → r. Which of the implications p → v, V → p is a tautology? Why (not)?

Write a propositional formula y with variables p, q,r in the conjunctive normal form that has exactly the following three models (i.e. satisfying assignments) v1, V2, V3: Vị 1 1 1 V2 1 V3 1 1 Let v denote the formula ¬q → r. Which of the implications p → v, V → p is a tautology? Why (not)?

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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Question

Write a propositional formula y with variables p, q,r in the conjunctive
normal form that has exactly the following three models (i.e. satisfying
assignments) v1, v2, V3:
V1
1
V2
1
1
V3
1
1
1
Let v denote the formula -q → r. Which of the implications y → v,
b → p is a tautology? Why (not)?

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