M. G. Bashmakova | Searcharxiv

arXiv2025

Recent advances in Bergman type projections in bounded pseudoconvex and tubular domains

The intention of this survey to collect in one paper many recent results and advances related with Bergman type projection acting in various spaces of analytic functions in several complex variables in the unit ball, tubular domains over symmetric cones and bounded strongly pseudoconvex domains between function spaces of different dimensions. Various new interesting extentions of old, classical results on Bergman projections will be provided in our survey. Previously all these results were given in various papers of the first author. Bergman type projections have many nice applications in complex function theory of several complex variables in tubular domains over symmetric cones and in bounded strongly pseudoconvex domains. Our results can be seen as direct extensions of previously known results provided earlier by E.Stein, D.Bekolle, D.Debertol, B.F.Sehba, W.S.Cohn, C.Nana, L.Chen, Sh.Zhang and others which relate function spaces with the same dimension. Practically all results on Bergman type projections acting between function spaces with different dimension may be valid both in context of tubular and pseudoconvex domains with similar proofs though we formulate some results only in tube or pseudoconvex domains. Some our results are new even in case of simplest unit disk and polydisk. Problems which are related with Bergman type projection acting between various analytic and measurable function spaces of different dimensions in various complicated domains in C^n are as far as we know completely new and may have various new interesting applications in compex function theory. In this paper various new interesting problems in this research area will also be formulated and posed by authors. Our results may be valid also with very similar proofs in various Siegel domains of second type, matrix domains, bounded symmetric domains and various other domains in C^n with complicated structure.

math.CV↗

arXiv2025

On embedding theorems in analytic and harmonic function spaces of several variables in some domains in $C^n$

In this survey we collect some recent advances concerning embedding theorems in analytic and harmonic function spaces of several variables in various domains in $C^n.$ Some sharp embedding results presented in this survey paper extend sharp embeddings in analytic function spaces obtained in higher dimension previously by J. Ortega, J. Fabrega, J. Cima, D. Luecking, M. Abate and many others in recent decades in the unit ball and bounded strongly pseudoconvex domains with the smooth boundary for onefunctional case to similar type analytic multyfunctional Bergman type function spaces. Same type multifunctional sharp extensions of some recent embedding results of one functional analytic function spaces of B. Sehba and D. Bekolle will be provided by us in this survey for unbounded domains namely for tubular domains over symmetric cones.In this paper we collect many new sharp embeddings in higher dimension obtained recently by first author though some one dimensional new sharp embeddings will be also mentioned shortly at the end of paper. Our results can be seen as direct sharp extensions of various sharp embedding theorems in analytic spaces in the unit disk obtained many years ago by L. Carleson, P. Duren, I. Verbitsky, D. Luecking and many others. Nice properties of so called $r$-lattices in various domains in $C^n$ are very important in all proofs of theorems of this paper.

math.CV↗