Local Operators and Markov Processes

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Mathematisches Institut der Universit~it Erlangen-NLirnberg Advisers: H. Bauer and K. Jakobs

816 Lucretiu Stoica

Local Operators and Markov Processes

Springer-Verlag Berlin Heidelberg New York 1980

Author Lucretiu Stoica Department of Mathematics, INCREST Bdul. Pacii 220 77538 Bucharest/Romania

AMS Su bject Classifications (1980): 31 D 05, 60 J 25, 60 J 35, 60 J 40, 60J45 ISBN 3-540-10028-8 Springer-Verlag Berlin Heidelberg NewYork ISBN 0-387-10028-8 Springer-Verlag NewYork Heidelberg Berlin Libraryof Congress Cataloging in PublicationData.Stoic& Lucretiu, 1949- Local operators and Markov processes.(Lecture notes in mathematics;816) Bibliography:p. Includes index. 1. Markov processes.2. Operatortheory.3. Potential,Theory of. I. Title. II. Series: Lecture notes in mathematics(Berlin); 816. QA3.L28 no. 816 [QA274.7] 510s [519.2'33] 80-20217 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 1980 Printed in Germany Printing and binding: Beltz Offsetdruck, Hemsbach/Bergstr. 2141/3140-543210

Introduction The p r e s e n t local

character

subject

has

such that

Meyer

been

treated

functions

and c o m p l e t e d

[19],

I.Cuculescu

A.Cornea

[13].

The c o n v e r s e

process,

was

potential

theoretic

T h e n J.C. each

first

Taylor

continuous

Feller,

yields

and A . C o r n e a type

locally

a harmonic

classical

introduced

and the k e r n e l s

by G . M o k o b o d z k i [23],

from the a x i o m a t i c

and D . S i b o n y Roth

table base. open

Similar

is a s s u m e d

sets

potential

to e l l i p t i c

(in [23]

) was

In C h a p t e r

space X such

transition

function

is unique.

was

a local o p e r a t o r

between

this n o t i o n

boundary

object

space,

value

out

by G . L u m e r

studied here

X, with

operators

our

a coun-

local ope-

and to have a base of

differs

a continuous

that its c h a r a c t e r i s t i c

On a

t h e o r y was n o i n t e d

the first to c o n s i d e r

I we c o n s t r u c t

of

to

operators.

for the P o i s s o n - D i r i c h l e t approach

theory

of a local o p e r a t o r

theoretic

principle

that

for the d i f f e r e n t i a l

considered

differential

to obey a m a x i m u m

but the spirit of the p r e s e n t state

were

[14].

is strong

potential

21. F u r t h e r

L, on a locally c o m p a c t

that are r e g u l a r

that G . L u m e r

onerators

[34].

axiomatic

[5] p r o v e d

He a s s o c i a t e d

potential

Markov

of C . C o n s t a n t i n e s c u

The r e l a t i o n

[31] Th.

to local

~24] and J.P. The m a i n

process.

continuous

ker