Order and Convexity in Potential Theory: H-Cones

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853 Nieu Boboe Gheorghe Bueur Aurel Cornea In Collaboration with Herbert Hollein

Order and Convexity in Potential Theory: H-Cones

Springer-Verlag Berlin Heidelberg New York 1981

Authors Nicu Boboc Department of Mathematics, University of Bucharest Str. Academiei 14, Bucharest, Romania Gheorghe Bucur Department of Mathematics, INCREST Bdul Pacii 220, Bucharest, Romania Aurel Cornea Department of Mathematics, INCREST Bdul Pacii 220, Bucharest, Romania and Fachbereich Mathematik, Universitat Frankfurt/M. Robert-Mayer-Str. 6-8, 6000 Frankfurt/M. Federal Republic of Germany Herbert Hollein Fachbereich Mathematik, Universitat Frankfurt/Main Robert-Mayer-Str. 6-8, 6000 Frankfurt/Main Federal Republic of Germany

AMS Subject Classifications (1980): 31 D05, 46A20, 46A40, 46A55, 60J45 ISBN 3-540-10692-8 Springer-Verlag Berlin Heidelberg New York ISBN 0-387-10692-8 Springer-Verlag New York Heidelberg Berlin

Library of Congress Cataloging in Publication Data. Boboc, Nicu, 1933- H-cones: order and convexity in potential theory. (Lecture notes in mathematics; v. 853) Bibliography; p. Includes indexes. 1. Potential, Theory of. 2. Cone. 3. Convex domains. I. Bucur, Gheorghe. II. Cornea, Aurel. Ill. Title. IV. Series: Lecture notes in mathematics (Springer-Verlag); v. 835. QA3.L28 vol. 853 [QA404] 510s [515.7J81-5241 AACR2

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 "Verwertungsgesellschaft Wort", Munich.

© by Springer-Verlag Berlin Heidelberg 1981 Printed in Germany Printing and binding: Beltz Offsetdruck, Hemsbach/Bergstr. 2141/3140-543210

CON TEN T S

Page Introduction

1

Terminology and notations

6

1. Resolvents 1.1. Excessive functions with respect to a resolvent

7

1.2. Resolvents in duality and energy form

23

Exercises

33

2. H-Cones 2.1. Definition and first results

35

2.2. H-morphisms

43

2.3. Dual and bidual of an H-cone

56

Exercises

62

3. H-Cones of functions 3.1. Definition and first results

68

3.2. Balayages

75

3.3. Thinness and base

83

3.4. Harmonic carrier on an H-cone

88

of functions 4. Standard H-Cones 4.1. Weak units, continuous and universally

96

continuous elements 4.2. Standard H-cones, natural topology

104

on the dual 4.3. Standard H-cones of functions

113

4.4. Standard H-cones of excessive functions

123

4.5. The natural topology

141

Exercises

148

IV

5. Potential theory on standard H-Cones of functions

Page

5.1. Localization

152

5.2. Balayages on standard H-cones of functions

163

5.3. Thinness, essential base and fine topology

171

5.4. Negligible and polar sets

177

5.5. Carrier theory on standard H-cones of functions

184

5.6. Convergence properties and sheaf properties for standard H-cones

202

Exercises

223