The modern theory of functional spaces and operators, built on powerful analytical methods, continues to evolve in the search for more precise, universal, and effective tools. Classical inequalities such as Hardy’s inequality, Remez’s inequality, the Bernstein-Nikolsky inequality, the Hardy-Littlewood-Sobolev inequality for the Riesz transform, the Hardy-Littlewood inequality for Fourier transforms, O’Neil’s inequality for the convolution operator, and others play a fundamental role in analysis, and their influence is hard to overestimate. With the development of new interpolation methods, new functional spaces, and novel problem formulations for functions of many variables, these inequalities have undergone significant advancements.

Inequalities and Integral Operators in Function Spaces focuses primarily on new approaches to the interpolation of spaces, which significantly extend the classical framework of the methods developed by Lions and Peetre. The book demonstrates how the use of net spaces and modern interpolation techniques not only provides a deeper understanding of the structure of functional spaces but also leads to stronger results that cannot be achieved within the traditional framework.

Features:

Can be used for specialized courses in harmonic analysis focusing on interpolation
Suitable for both researchers in the field of real analysis and mathematicians interested in applying these methods to related areas
Contains new and interesting results, previously unpublished

About the Author

Erlan Nursultanov is a Doctor of Physical and Mathematical Sciences and a Professor at the Kazakhstan Branch of Lomonosov Moscow State University. He graduated from the Faculty of Mathematics at Karaganda State University in 1979 and completed his postgraduate studies at the Faculty of Mechanics and Mathematics of Moscow State University in 1982. He received his PhD in Mathematics in 1983 (MSU) and his Doctor of Sciences degree in 1999 from the Steklov Mathematical Institute of the Russian Academy of Sciences. His research interests include harmonic analysis, operator theory, interpolation of function spaces, and approximation theory. He is the author of over 100 scientific publications.

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