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AuthorPolishchuk, Efim M. author
TitleContinual Means and Boundary Value Problems in Function Spaces [electronic resource] / by Efim M. Polishchuk
ImprintBasel : Birkhรคuser Basel, 1988
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Descript 160 p. online resource


The fates of important mathematical ideas are varied. Sometimes they are instantly appreciated by the specialists and constitute the foundation of the development of theories or methods. It also happens, however, that even ideas uttered by distinguished mathematicians are surrounded with respectful indifference for a long time, and every effort of interยญ preters and successors has to be made in order to gain for them the merit deserved. It is the second case that is encountered in the present book, the author of which, the Leningrad mathematician E.M. Polishchuk, reconstructs and develops one of the dir.ctions in functional analysis that originated from Hadamard and Gateaux and was newly thought over and taken as the basis of a prospective theory by Paul Levy. Paul Levy, Member of the French Academy of Sciences, whose centenary of his birthday was celebrated in 1986, was one of the most original matheยญ matiCians of the second half of the 20th century. He could not complain about a lack of attention to his ideas and results. Together with A.N. Kolmogorov, A.Ya. Khinchin and William Feller, he is indeed one of the acknowledged founders of the theory of random processes. In the probaยญ bility theory and, to a lesser degree, in functional analysis his work is well-known for its conceptualization and scope of the problems posed


1. Functional Classes and Function Domains. Mean Values. Harmonicity and the Laplace Operator in Function Spaces -- 1. Functional classes -- 2. Function domains -- 3. Continual means -- 4. The functional Laplace operator -- 2 Chapter 2. The Laplace and Poisson Equations For a Normal Domain -- 5. Boundary value problems for a normal domain with boundary values on the Gรขteaux ring -- 6. Semigroups of continual means. Relations to the probability solutions of classical boundary value problems. Applications of the integral over a regular measure -- 3. The Functional Laplace Operator and Classical Diffusion Equations. Boundary Value Problems for Uniform Domains. Harmonic Controlled Systems -- 7. Boundary value problems with strong Laplacian and their parallelism to classical parabolic equations -- 8. Boundary value problems for uniform domains -- 9. Harmonic control systems -- 4. General Elliptic Functional Operators on Functional Rings -- 10. The Dirichlet problem in the space of summable functions and related topics -- 11. The generalized functional Poisson equation -- Comments -- References

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