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The Mathematics of Various Entertaining SubjectsResearch in Recreational Math$
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Jennifer Beineke and Jason Rosenhouse

Print publication date: 2015

Print ISBN-13: 9780691164038

Published to Princeton Scholarship Online: October 2017

DOI: 10.23943/princeton/9780691164038.001.0001

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Representing Numbers Using Fibonacci Variants

Representing Numbers Using Fibonacci Variants

(p.245) 17 Representing Numbers Using Fibonacci Variants
The Mathematics of Various Entertaining Subjects

Stephen K. Lucas

Princeton University Press

This chapter introduces the Zeckendorf representation of a Fibonacci sequence, a form of a natural number which can be easily found using a greedy algorithm: given a number, subtract the largest Fibonacci number less than or equal to it, and repeat until the entire number is used up. This chapter first compares the efficiency of representing numbers using Zeckendorf form versus traditional binary with a fixed number of digits and shows when Zeckendorf form is to be preferred. It also shows what happens when variants of Zeckendorf form are used. Not only can natural numbers as be presented sums of Fibonacci numbers, but arithmetic can also be done with them directly in Zeckendorf form. The chapter includes a survey of past approaches to Zeckendorf representation arithmetic, as well as some improvements.

Keywords:   Zeckendorf representation, Fibonacci sequence, Fibonacci variants, Fibonacci humber, traditional binary, Zeckendorf form, natural numbers, arithmetic, Eduourd Zeckendorf

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