What extra capabilities does a Turing reduction have compared to a polynomial-time mapping reduction? It can run for longer than polynomial time. In showing A is Turing reducible to B, the decider for A can call the decider for B and output the opposite answer. The reduction may not halt. In showing A is Turing reducible to B, the decider for A can call the decider for B more than once.
What extra capabilities does a Turing reduction have compared to a polynomial-time mapping reduction? It can run for longer than polynomial time. In showing A is Turing reducible to B, the decider for A can call the decider for B and output the opposite answer. The reduction may not halt. In showing A is Turing reducible to B, the decider for A can call the decider for B more than once.
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:What extra capabilities does a Turing reduction have compared to a polynomial-time mapping
reduction?
It can run for longer than polynomial time.
In showing A is Turing reducible to B, the decider for A can call the decider for B and output the opposite
answer.
The reduction may not halt.
In showing A is Turing reducible to B, the decider for A can call the decider for B more than once.
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