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Exploring Continued Fractions

Exploring Continued Fractions

Autorzy
Wydawnictwo American Mathematical Society
Data wydania 01/08/2019
Wydanie Pierwsze
Liczba stron 371
Forma publikacji książka w twardej oprawie
Poziom zaawansowania Dla profesjonalistów, specjalistów i badaczy naukowych
Język angielski
ISBN 9781470447953
Kategorie Teoria liczb
276.00 PLN (z VAT)
$75.07 / €61.55 / £52.87 /
Produkt dostępny
Dostawa 2 dni
Ilość
Do schowka

Opis książki

There is a nineteen-year recurrence in the apparent position of the sun and moon against the background of the stars, a pattern observed long ago by the Babylonians. In the course of those nineteen years the Earth experiences 235 lunar cycles. Suppose we calculate the ratio of Earth's period about the sun to the moon's period about Earth. That ratio has 235/19 as one of its early continued fraction convergents, which explains the apparent periodicity. Exploring Continued Fractions explains this and other recurrent phenomena-astronomical transits and conjunctions, lifecycles of cicadas, eclipses-by way of continued fraction expansions. The deeper purpose is to find patterns, solve puzzles, and discover some appealing number theory. The reader will explore several algorithms for computing continued fractions, including some new to the literature. He or she will also explore the surprisingly large portion of number theory connected to continued fractions: Pythagorean triples, Diophantine equations, the Stern-Brocot tree, and a number of combinatorial sequences. The book features a pleasantly discursive style with excursions into music (The Well-Tempered Clavier), history (the Ishango bone and Plimpton 322), classics (the shape of More's Utopia) and whimsy (dropping a black hole on Earth's surface). Andy Simoson has won both the Chauvenet Prize and Polya Award for expository writing from the MAA and his Voltaire's Riddle was a Choice magazine Outstanding Academic Title. This book is an enjoyable ramble through some beautiful mathematics. For most of the journey the only necessary prerequisites are a minimal familiarity with mathematical reasoning and a sense of fun.

Exploring Continued Fractions

Spis treści

Patterns
Tally bones to the integers
Leibniz and the binary revolution
Mathematical induction
Al-Maghribi meets Sodoku
GCD's and diophantine equations
Fractions in the Pythagorean scale
A tree of fractions
Bach and the well-tempered clavier
The harmonic series
A clay tablet
Families of numbers
Planetary conjunctions
Simple and strange harmonic motion
The size and shape of Utopia Island
Classic elliptical fractions
The Cantor set
Continued fractions
The longevity of the 17-year cicada
Transits of Venus
Meton of Athens
Lunar rhythms
Eclipse lore and legends
Diophantine eclipses
List of symbols used in the test
An introduction to vectors and matrices
Computer algebra system codes
Comments on selected exercises
Bibliography
Index

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