Topological Vector Spaces The Theory Without Convexity Conditions

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639 Norbert Adasch Bruno Ernst DjAfar Keirn

Topological Vector Spaces The Theory Without Convexity Conditions

Springer-Verlag Berlin Heidelberg New York 1978

Authors Norbert Adasch Fachbereich der Mathematik der Universitat Robert Mayer-Str. 10 0-6000 Frankfurt am Main Bruno Ernst Fachbereich Mathematik der Gesamthochschule Warburger Str. 100 0-4790 Paderborn Dieter Keim Fachbereich Mathematik der Universitat Robert Mayer-Str. 10 0-6000 Frankfurt am Main

AMS Subject Classifications (1970): 46-02, 46A05, 46A07, 46A09, 46A15, 46A30 ISBN 3-540-08662-5 Springer-Verlag Berlin Heidelberg New York ISBN 0-387-08662-5 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

Unserem verehrten Lehrer Gottfried

Kothe

in Dankbarkeit gewidmet

Contents page

Introduction Strings and linear topologies

§

5

§

2

Metrizable topological vector spaces

10

§

3

Projective limits of topological vector spaces

16

§

4

Inductive limits of topological vector spaces

19

§

5

Topological direct sums, strict inductive limits

24

§

6

Barrelled topological vector spaces

31

§

7

The Banach-Steinhaus theorem

38

§

8

Barrelled spaces and the closed graph theorem

41

§

9

Barrelled spaces and the open mapping theorem

47

§ 10

Completeness and the closed graph theorem

51

§ 11

Bornological spaces

60

§ 12

Spaces of continuous linear mappings and their completion

66

§ 13

Quasibarrelled spaces

70

§ 14

Boundedly summing spaces

74

§ 15

Locally topological spaces

79

§ 16

Spaces with an absorbing sequence

84

§ 17

() -locally topological spaces

92

§ 18

(DF)-spaces and spaces with a fundamental sequence of compact sets

98

§ 19

Some examples and counter examples

109

References

118

Subject Index

123

One of the earliest and most important results in functional analysis are the closed graph theorem and the open mapping theorem of Banach and Schauder. Usually these theorems are known for Banach spaces, but already the original version gives their validity for complete metrizable topological vector spaces, a class of spaces including not only the Banach spaces, but also other important spaces for which in general duality methods cannot be applied in the proofs. But this "non convex" approach was dropped in the following development of functional analysis. Starting from Banach spaces the theory turned to the more general class of locally convex spaces, making extensive use of the close interrelation betwee