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Excursions in Geometry by C.Stanley Ogilvy at Abbey's Bookshop,
Excursions in Geometry
— —
C.Stanley Ogilvy

Excursions in Geometry

C.Stanley Ogilvy

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English
Dover
01 December 1990
Mathematics & Sciences; Geometry; Topology
Series: Dover Books on Mathema 1.4tics
"A straightedge, compass, and a little thought are all that's needed to discover the intellectual excitement of geometry. Harmonic division and Apollonian circles, inversive geometry, hexlet, Golden Section, more.

""A charming, entertaining, and instructive book …. The writing is exceptionally lucid, as in the author's earlier books, … and the problems carefully selected for maximum interest and elegance."" - Martin Gardner.

This book is intended for people who liked geometry when they first encountered it (and perhaps even some who did not) but sensed a lack of intellectual stimulus and wondered what was missing, or felt that the play was ending just when the plot was finally becoming interesting.

In this superb treatment, Professor Ogilvy demonstrates the mathematical challenge and satisfaction to be had from geometry, the only requirements being two simple implements (straightedge and compass) and a little thought. Avoiding topics that require an array of new definitions and abstractions,

Professor Ogilvy draws upon material that is either self-evident in the classical sense or very easy to prove. Among the subjects treated are: harmonic division and Apollonian circles, inversion geometry, the hexlet, conic sections, projective geometry, the golden section, and angle trisection. Also included are some unsolved problems of modern geometry, including Malfatti's problem and the Kakeya problem.

Numerous diagrams, selected references, and carefully chosen problems enhance the text. In addition, the helpful section of notes at the back provides not only source references but also much other material highly useful as a running commentary on the text."
By:  
Imprint:   Dover
Country of Publication:   United States
Edition:   New edition
Dimensions:   Height: 215mm,  Width: 136mm,  Spine: 10mm
Weight:   205g
ISBN:   9780486265308
ISBN 10:   0486265307
Series:   Dover Books on Mathema 1.4tics
Pages:   192
Publication Date:  
Audience:   General/trade ,  ELT Advanced
Format:   Paperback
Publisher's Status:   Unspecified
Introduction 1 A bit of background A practical problem A basic theorem Means 2 Harmonic division and Apollonian circles Harmonic conjugates The circle of Apollonius Coaxial families 3 Inversive geometry Transformations Inversion Invariants Cross-ratio 4 Application for inversive geometry Two easy problems Peaucellier's linkage Apollonius' problem Steiner chains The arbelos 5 The hexlet The conics defined A property of chains Soddy's hexlet Some new hexlets 6 The conic sections The reflection property Confocal conics Plan sections of a cone A characteristic of parabolas 7 Projective geometry Projective transformations The foundations Cross-ratio The complete quadrangle Pascal's Theorem Duality 8 Some Euclidean topics A navigation problem A three-circle problem The Euler line The nine-point circle A triangle problem 9 The golden section The pentagram Similarities and spirals The regular polyhedra The continued fraction for o 10 Angle trisection The unsolved problems of antiquity Other kinds of trisection 11 Some unsolved problems of modern geometry Convex sets and geometric inequalities Malfatti's problem The Kakeya problem Notes Index

Reviews for Excursions in Geometry

A follow-up to his Excursions in Number Theory, this book is intended to demonstrate that geometry is really not so dull as you may have thought it. It actually requires a considerable prior interest in and inclination for mathematical recreation, since it takes one beyond the trivial theorems proved within the framework of the usual geometry course to the startlingly good ones just around the corner. The excursion progresses through Harmonic division, Apollonian circles, inversion geometry, the hexlet, conic sections, projective geometry, the Golden Section, and angle trisection, with side jaunts to some of geometry's classic unsolved problems. The few practical applications provided are not exactly the sort of problems you'd run into every day. Though the material does not require extensive new definitions and abstractions, and the tools are the familiar straightedge and compass, it is definitely not mathematics for the millions. (Kirkus Reviews)


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