The universality of one half in commutative nonassociative algebras with identities

VG Tkachev - Journal of Algebra, 2021 - Elsevier
In this paper we will explain an interesting phenomenon which occurs in general
nonassociative algebras. More precisely, we establish that any finite-dimensional …

Spectral properties of nonassociative algebras and breaking regularity for nonlinear elliptic type PDE\MakeLowercase {s}

V Tkachev - St. Petersburg Mathematical Journal, 2020 - ams.org
In this paper, we address the following question: Why certain nonassociative algebra
structures emerge in the regularity theory of elliptic type PDEs and also in constructing …

Medial and isospectral algebras

Y Krasnov, V Tkachev - arXiv preprint arXiv:2210.08245, 2022 - arxiv.org
The purpose of this paper is to give a systematic study of two new classes of commutative
nonassociative algebras, the so-called isospectral and medial algebras. An isospectral …

[HTML][HTML] A correction of the decomposability result in a paper by Meyer–Neutsch

VG Tkachev - Journal of Algebra, 2018 - Elsevier
In their paper of 1993, Meyer and Neutsch established the existence of a 48-dimensional
associative subalgebra in the Griess algebra G. By exhibiting an explicit counter example …

The commutative nonassociative algebra of metric curvature tensors

DJF Fox - Forum of Mathematics, Sigma, 2021 - cambridge.org
The space of tensors of metric curvature type on a Euclidean vector space carries a two-
parameter family of orthogonally invariant commutative nonassociative multiplications …

On an extremal property of Jordan algebras of Clifford type

VG Tkachev - Communications in Algebra, 2019 - Taylor & Francis
If V is a finite-dimensional unital commutative (maybe nonassociative) algebra carrying an
associative positive definite bilinear form〈,〉 then there exist a nonzero idempotent c≠ e (e …

Angular momentum and Horn's problem

A Chenciner, HJ Perez - arXiv preprint arXiv:1110.5030, 2011 - arxiv.org
We prove a conjecture made by the first author: given an n-body central configuration X_0 in
the euclidean space R^{2p}, let Im F be the set of ordered real p-tuples …

On polynomial solutions to the minimal surface equation

Y Guo - arXiv preprint arXiv:2404.00115, 2024 - arxiv.org
We are interested in finding nonlinear polynomials $ P $ on $\mathbb {R}^ n $ that solves
the minimal surface equation. We first prove a structure theorem on such polynomials. We …

Algebraic CMC hypersurfaces of order 3 in Euclidean spaces

O Perdomo, VG Tkachev - Journal of Geometry, 2019 - Springer
Understanding and finding of general algebraic constant mean curvature surfaces in the
Euclidean spaces is a hard open problem. The basic examples are the standard spheres …

Note on an eigenvalue problem for an ODE originating from a homogeneous 𝑝-harmonic function

M Akman, J Lewis, A Vogel - St. Petersburg Mathematical Journal, 2020 - ams.org
We discuss what is known about homogeneous solutions $ u $ to the $ p $-Laplace
equation, $ p $ fixed, $1< p<\infty $, when $(A) u $ is an entire $ p $-harmonic function on …