Fractions: A Sliver of the Story
Fractions are everywhere and yet most of us learn only basic and rather dry facts about fractions in primary school. This book makes fractions come to life in a friendly, lively, and accessible way, detailing the history of fractions and their crucial role in the work of mathematicians from various cultures throughout the ages.

The book begins by outlining the importance of rational numbers and links ancient Babylonian mathematics with modern processes for determining their decimal expansions and the period length of repeating decimals, which are worked out in full. This then leads to the study of infinite sums, especially to geometric series and the notions of convergence and divergence.

The text goes on to explain the importance of the Fibonacci numbers, as well as the Cantor set and the Sierpiński carpet. Much of elementary number theory is introduced including congruence classes, the Euler phi function, the Euclidean algorithm, and some Diophantine equations.

The book also discusses many historical applications of fractions, including Christiaan Huygens's cogwheeled planetarium and Archimedes's approximation to the value of pi, as well as an extensive study of the importance of Egyptian fractions. Finally, it outlines modern applications of fractions, such as the fair apportionment of a cake, variations on slicing a pizza, probability questions involving markings on a stick, and ways to divide a bar of gold in order to pay wages for various numbers of days.

Accessible to anyone with a passion for the history of mathematics who wishes to delve deeper into the wonderful world of fractions, this book will also be of special interest to teachers of mathematics and students of all ages.
1146621463
Fractions: A Sliver of the Story
Fractions are everywhere and yet most of us learn only basic and rather dry facts about fractions in primary school. This book makes fractions come to life in a friendly, lively, and accessible way, detailing the history of fractions and their crucial role in the work of mathematicians from various cultures throughout the ages.

The book begins by outlining the importance of rational numbers and links ancient Babylonian mathematics with modern processes for determining their decimal expansions and the period length of repeating decimals, which are worked out in full. This then leads to the study of infinite sums, especially to geometric series and the notions of convergence and divergence.

The text goes on to explain the importance of the Fibonacci numbers, as well as the Cantor set and the Sierpiński carpet. Much of elementary number theory is introduced including congruence classes, the Euler phi function, the Euclidean algorithm, and some Diophantine equations.

The book also discusses many historical applications of fractions, including Christiaan Huygens's cogwheeled planetarium and Archimedes's approximation to the value of pi, as well as an extensive study of the importance of Egyptian fractions. Finally, it outlines modern applications of fractions, such as the fair apportionment of a cake, variations on slicing a pizza, probability questions involving markings on a stick, and ways to divide a bar of gold in order to pay wages for various numbers of days.

Accessible to anyone with a passion for the history of mathematics who wishes to delve deeper into the wonderful world of fractions, this book will also be of special interest to teachers of mathematics and students of all ages.
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Fractions: A Sliver of the Story

Fractions: A Sliver of the Story

by Peter D. Schumer
Fractions: A Sliver of the Story

Fractions: A Sliver of the Story

by Peter D. Schumer

Hardcover

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Overview

Fractions are everywhere and yet most of us learn only basic and rather dry facts about fractions in primary school. This book makes fractions come to life in a friendly, lively, and accessible way, detailing the history of fractions and their crucial role in the work of mathematicians from various cultures throughout the ages.

The book begins by outlining the importance of rational numbers and links ancient Babylonian mathematics with modern processes for determining their decimal expansions and the period length of repeating decimals, which are worked out in full. This then leads to the study of infinite sums, especially to geometric series and the notions of convergence and divergence.

The text goes on to explain the importance of the Fibonacci numbers, as well as the Cantor set and the Sierpiński carpet. Much of elementary number theory is introduced including congruence classes, the Euler phi function, the Euclidean algorithm, and some Diophantine equations.

The book also discusses many historical applications of fractions, including Christiaan Huygens's cogwheeled planetarium and Archimedes's approximation to the value of pi, as well as an extensive study of the importance of Egyptian fractions. Finally, it outlines modern applications of fractions, such as the fair apportionment of a cake, variations on slicing a pizza, probability questions involving markings on a stick, and ways to divide a bar of gold in order to pay wages for various numbers of days.

Accessible to anyone with a passion for the history of mathematics who wishes to delve deeper into the wonderful world of fractions, this book will also be of special interest to teachers of mathematics and students of all ages.

Product Details

ISBN-13: 9780198916536
Publisher: Oxford University Press
Publication date: 03/10/2025
Pages: 240
Product dimensions: 5.67(w) x 8.74(h) x 0.71(d)

About the Author

Peter D. Schumer, John C. Baldwin Professor of Mathematics and Natural Philosophy, Middlebury College

Peter D. Schumer Received BS and MS degrees from Rensselaer Polytechnic Institute and obtain his PhD from the University of Maryland. He is currently full professor and John C. Baldwin Professor of Mathematics and Natural Philosophy at Middlebury College. He has undertaken sabbaticals at Stanford, UC Berkeley, UC San Diego, Doshisha University (Kyoto), ICU (Tokyo). He has published two books and was the recipient of the Trevor Evans Award of the MAA in 2000, and the American Go Federation Teacher of the Year Award in 2021.

Table of Contents

Preface Acknowledgments 1. Terminating and Repeating Decimals 2. Geometric Series, Powers of Three 3. Fibonacci Numbers 4. Congruence Classes 5. Euclidean Algorithm 6. Euler Phi Function and the Period Length of Repeating Decimals 7. A Very Brief Introduction to Matrices 8. Farey Fractions 9. A Digression on Cutting Cakes and Marking Sticks 10. Egyptian Fractions 11. Are All Real Numbers Rational? 12. Continued Fractions 13. Archimedes' Determination of Pi 14. Crash Course on Infinite Series 15. Introduction to Taylor Series 16. Special Sums of Fractions 17. Some Spectacular Sums of Fractions Exercise Solutions Bibliography Index
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