Shape Theory An Introduction

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688 Jerzy Dydak Jack Segal

Shape Theory An Introduction

Springer-Verlag Berlin Heidelberg New York 1978

Authors Jerzy Dydak Institute of Mathematics Polish Academy of Sciences ul Sniadeckich 8 Warszawa/Poland

Jack Segal Department of Mathematics University of Washington Seattle, WA 98195/USA

AMS Subject Classifications (1970): 54C56, 54C55, 55 B05

ISBN 3-540-08955-1 Springer-Verlag Berlin Heidelberg New York ISBN 0-387-08955-1 Springer-Verlag New York Heidelberg Berlin This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically those of translation, reprinting, re-use of illustrations, broadcasting, reproduction by photocopying machine or similar means, and storage in data banks. Under§ 54 of the German Copyright Law where copies are made for other than private use, a fee is payable to the publisher, the amount of the fee to be determined by agreement with the publisher.

© by Springer-Verlag Berlin Heidelberg 1978 Printed in Germany Printing and binding: Beltz Offsetdruck, Hemsbach/Bergstr. 2141/3140-543210

to

Arlene and Barbara

CONTENTS Chapter I.

Introduction .

Chapter II.

Preliminaries

Chapter III.

§1.

Topology

6

§2.

Homotopy Theory

8

§3.

Category Theory

11

The Shape Category §1. §2.

Chapter IV.

1

20

Definition of the Shape Category Some properties of the shape category and the shape functor .

26

§3.

Representation of shape morphisms

30

§4.

Borsuk's approach to shape theory

32 36

§5. Chapman's Comrlement Theorem General Properties of the Shape Category and the Shape Functor §1.

Chapter

v.

Chapter VI.

Continuity

47

§2.

Inverse Limits in the Shape Category

51

§3.

Fox's Theorem in Shape Theory . . . .

§4.

Shape Properties of Some Decomposition Spaces

53 56

§5. Space of Components . . . . . . . . . . . . . Shape Invariants v

§1.

Cech homology, cohomology, and homotopy pro-groups . .

64

§2.

Movability and n-movability

64

§3.

Deformation Dimension

68

§4.

Shape retracts

74

Algebraic Properties Associated with Shape Theory §1.

The Mittag-Leffler condition and the use of lim 1 .

77 81

+

Chapter VII.

60

§2. Homotopy idempotents Pointed 1-movability §1.

Definition of pointed 1-movable continua and their properties

88

§2.

Representation of pointed 1-movable continua

93

§3.

Pointed 1-movability on curves

98

. . . .

Chapter VIII. Whitehead and Hurewicz Theorems in Shape Theory §1.

Chapter IX.

Preliminary results . . . . .

103

§2.

The Whitehead Theorem in shape theory

106

§3.

The Hurewicz Theorem in shape theory

109

Characterizations and Properties of Pointed ANSR's §1.

Preliminary results . . . . . . . .

111

§2.

Characterizations of pointed ANSR's

114

VI

Chapter X.

§3.

The Union Theorem for ANSR's

116

§4.

ANR-divisors

119

Cell-like Maps §1.

Preliminary definitions and results

123

§2.

The Smale Theorem in shape theory .

127

§3.

Examples of cell-like maps which are not shape equivalences

§4. Chapter XI.

.

. .

.

Hereditary shape equivalences

S