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Mathematics
The formulas for the lower Taylor coefficients of homogeneous surfaces
V. I. Sukovykh Voronezh State University
Abstract:
This article is related to the
descriptions problem for holomorphically homogeneous real
hypersurfaces in three-dimensional complex spaces.
A common coefficients approach is developing to the
study of homogeneity on the base of symbolic mathematics and
computing.
The aim of this approach is to look for opportunities to
describe homogeneous real hypersurfaces of a
$3$-dimensional complex
space in terms of the Taylor coefficients of their defining functions.
The result of A. V. Loboda (2000) may be called here as a reference point.
It allows to describe homogeneous hypersurfaces in two-dimensional
complex space in terms of triple of real
Taylor coefficients. This triple itself satisfies certain
polynomial constraints.
To study the problem in a much more complicated three-dimensional
case it is necessary to work with a large amount of information.
In this article, it is done by a Maple symbolic computation computer package.
In this article one particular case is considered of
strictly pseudo-convex real hypersurfaces in
which foreseeable formulas can be obtained for the parameters and
coefficients of the problem under consideration.
The main result of this paper is the reduction the number of
parameter describing the property of homogeneity from
$16$ coefficients
(according to the result of the author and A. V. Loboda, 2015) to
$7$ ones.
The obtained polynomial system of
restrictions on these coefficients, involves five equations.
Its consequence is the estimate of the number of homogeneous
surfaces of studied class.
In the article the relations are given between the parameters of
holomorphic vector fields tangent to the studied homogeneous surfaces.
In the case under discussion, these relationships also have a
relatively simple form.
The article describes an example confirming the validity of the formulas
obtained in it by comparing them with coefficients of concrete homogeneous
surface.
Keywords:
holomorphic transformation, Taylor series, real hypersurface, Lie algebra, normal form of equation,
system of polynomial equations, symbolic computation.
UDC:
517.55+004.94
BBK:
22.161.5+32.973.2
DOI:
10.15688/jvolsu1.2016.5.10