From Discrete to Continuous The Broadening of Number Concepts in

In the early modern period, a crucial transformation occurred in the classical conception of number and magnitude. Traditionally, numbers were merely collections of discrete units that measured some multiple. Magnitude, on the other hand, was usually desc

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AUSTRALASIAN STUDIES IN HISTORY AND PHILOSOPHY OF SCIENCE VOLUME 16

General Editor:

R. W. HOME, University 0/ Melboume Editorial Adv isory Board:

W. R. ALBURY, University 0/New South Wales D. W. CHAMBERS, Deakin University S. GAUKROGER, University 0/Sydney H. E. LE GRAND, University 0/Melboume A. MUSGRAVE, University ofOtago G. C. NERLICH, University 0/Adelaide D. R. OLDROYD, University 0/ New South Wales E. RICHARDS, University o/Wollongong J. SCHUSTER, University o/Wollongong R. YEO, Griffitb University

The titles published in this series are listed at the end of this volume.

KATHERINE NEAL The University 0/ Sydney, Sydney, Australia

FROM DISCRETE TO CONTINUOUS The Broadening 0/ Number Concepts in Early Modem England

Springer-Science+Business Media, B.Y.

Library of Congress Cataloging-in-Publication Data

ISBN 978-90-481-5993-2 ISBN 978-94-017-0077-1 (eBook) DOI 10.1007/978-94-017-0077-1

Printed on acid-free paper

All Rights Reserved © 2002 Springer Science +Business Media Dordrecht Originall y published by Kluwer Academic Publishers in 2002. Softco ver reprint ofthe hardco ver 1st edition 2002

No part of the material protected by this copyright notice may be reproduced or utilized in any form or by any means, electronic or mechanical , including photocopying, recording or by any inform ation storage and retrieval system , without written permission from the copyright owner.

For my grandmother Katherine Johnson and my daughter Elizabeth

TABLE OF CONTENTS

Acknowledgments:

ix

Cbapter 1:

Transformation of tbe Number Concept

Cbapter 2:

The Ancient Sources Aristotle Euclid Proclus Greek Atomists

22 25

Cbapter3:

The Contemporary Inßuences The Abacus Tradition Simon Stevin The Techniques of Viete Descartes Conclusion

28 28 33 36 39 45

Cbapter4:

Early Modern Englisb Algebra The Nature of the Texts Robert Recorde The Treatment of Numbers in Arithmetic Texts John Tapp Thomas Harriot's Arts Analyticae Praxis Oughtred's Clav is Mathematicae Conclusion

47 49 58 61 62 71

12

12 17

46

77

Cbapter 5:

Tbe Development of tbe Logaritbms: Napier and Briggs Napier's Background Algebra Napier's Logarithms Briggs and Numerical Methods Briggs' Method of Construction Conclusion

80 84 85 87 104 106 113

Cbapter6:

Isaac Barrow Background and Education Barrow's Mathematical Practice Foundational Issues in Barrow's Cambridge Lectures Conclusion

11S

John Wallis Background and Education Wallis' Mathernatical Practice The Composition of Continua Conclusion

138

Conclusion

158

Cbapter7:

Cbapter8:

116 121 132 136 139 143 151 155

References:

163

Indices:

171

ACKNOWLEDGMENTS

I have received financial help for this book from the University ofToronto in the form of a May Fellowship and from the University of Sydney. Several people have read this book in its many forms. I would like to thank Craig Fraser and Alexander Jones for their support in writing the original thesis , on which this book is based. The anonymous readers provided a great deal of valuable criticism, and I thank them for their detail