13. In the DPLL algorithm for the satisfiability problem of propositional logic clauses given in conjunctive normal form, once some clause contains only one literal that can be made true (because the choices made on that search path have already assigned every other literal in that clause to be false), that literal will be automatically chosen as the next literal to be assigned the value in backtracking without any branching on that recursion level. What is the name of this important speedup technique? (a) Unit propagation (b) Pure literal elimination (c) Index resolution (d) Refutation clause learning

13. In the DPLL algorithm for the satisfiability problem of propositional logic clauses given in conjunctive normal form, once some clause contains only one literal that can be made true (because the choices made on that search path have already assigned every other literal in that clause to be false), that literal will be automatically chosen as the next literal to be assigned the value in backtracking without any branching on that recursion level. What is the name of this important speedup technique? (a) Unit propagation (b) Pure literal elimination (c) Index resolution (d) Refutation clause learning

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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Concept explainers

Recurrence relation

A recurrence relation or recursive relation is an equation that represents a function in terms of the values of its smaller inputs. Every recurrence relation T(n) is a recursive function of integer n and consists of a base case and a recursive case.

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Need the right answer among choices and also an explanation of the answer.

13. In the DPLL algorithm for the satisfiability problem of propositional logic clauses given in conjunctive
normal form, once some clause contains only one literal that can be made true (because the choices made
on that search path have already assigned every other literal in that clause to be false), that literal will be
automatically chosen as the next literal to be assigned the value in backtracking without any branching on
that recursion level. What is the name of this important speedup technique?
(a) Unit propagation
(b) Pure literal elimination
(c) Index resolution
(d) Refutation clause learning

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