Press Release: Quasinearly subharmonic functions

Harmonic functions play a crucial role in mathematics. The same is true for a generalized class, for subharmonic functions. In this important area many authors, to mention just a few, Szpilrajn, Radó, Brelot, Lelong, Avanissian, Hervé, and Lieb and Loss, have found it useful to consider more general function classes, namely quasisubharmonic functions, nearly subharmonic functions, and almost subharmonic functions.

The main topic of the book ‘Subharmonic Functions, Generalizations, Holomorphic Functions, Meromorphic Functions, and Properties’ is quasinearly subharmonic functions. This new, quite recently defined class includes quasisubharmonic functions, nearly subharmonic functions and even almost subharmonic functions, at least more or less. Our class has its roots at least in the late fifties. The class of quasinearly subharmonic functions includes, in addition to nearly subharmonic functions, also functions satisfying certain growth conditions, especially certain eigenfunctions, polyharmonic functions, and subsolutions of certain general elliptic equations. Since harmonic functions are included in our class, nonnegative solutions of some elliptic equations are included. In particular, the partial differential equations associated with quasiregular mappings belong to this family of elliptic equations. Though the class of quasinearly subharmonic functions is indeed large, the use of it is justified. With the aid of quasinearly subharmonic functions we are able to simplify and clarify certain proofs of subharmonic functions, and in certain cases to improve the existing results. Examples, among others, are subharmonicity results of separately subharmonic functions, domination condition results for families of subharmonic functions and weighted boundary behavior results of subharmonic functions. Moreover, we give removability results for subharmonic functions, for separately subharmonic functions, for harmonic functions, for separately harmonic functions, and for holomorphic and for meromorphic functions. Read the full Press Release to find out more: https://www.eurekalert.org/pub_releases/2021-05/bsp-qsf053121.php

For more information about the book, please visit: https://benthambooks.com/book/9789811498701/

Author: Bentham Science Publishers

A major STM journal publisher of more than 100 online and print journals and related print/online book series, Bentham Science answers the information needs of scientists in the fields of pharmaceutical, biomedical, medical, engineering, technology, computer and social sciences.

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