output
20102026
most citedClassification of generalized Wallach spaces

31 citations

31 papers

math.FA2026

Norms of generalized derivations with values in symmetric spaces

J. Huang, M. Pliev, F. Sukochev +1

Let be the -algebra of all bounded linear operators on a Hilbert space . A classical result due to Stamplfi shows that, for any ,…

math.AP2025

Inverse problem for wave equation of memory type with acoustic boundary conditions: Global solvability

Zhanna D. Totieva, Kush Kinra, Manil T. Mohan

In this article, we study the one-dimensional inverse problem of determining the memory kernel by the integral overdetermination condition for the direct problem of finding the vel…

math.MG2025

On face angles of tetrahedra with a given base

E. V. Nikitenko, Yu. G. Nikonorov

Let us consider the set of all tetrahedra with a given non-degenerate base in and lying outside the plane . Let us denote by…

math.DG2024★ 2 cited

On geodesic orbit nilmanifolds

Yu. G. Nikonorov

The paper is devoted to the study of geodesic orbit Riemannian metrics on nilpotent Lie groups. The main result is the construction of continuous families of pairwise non-isomorphi…

math.MG2023

The extreme polygons for the self Chebyshev radius of the boundary

Evgenii V. Nikitenko, Yurii G. Nikonorov

The paper is devoted to some extremal problems for convex polygons on the Euclidean plane, related to the concept of self Chebyshev radius for the polygon boundary. We consider a g…

math.FA2022

Stone--Weierstrass Approximation Revisited

A. G. Kusraev, S. S. Kutateladze

The aim of the present article is to extend the Stone--Weierstrass theorem to functions ranging in a lattice normed space and order rather than topological approximation. We procee…

math.MG2022★ 2 cited

Some extremal problems for polygons in the Euclidean plane

Yu. G. Nikonorov, O. Yu. Nikonorova

The paper is devoted to some extremal problems, related to convex polygons in the Euclidean plane and their perimeters. We present a number of results that have simple formulations…

math.MG2021★ 2 cited

Properties of a curve whose convex hull covers a given convex body

Yurii Nikonorov

In this note, we prove the following inequality for the norm of a convex body in , : $N(K) \leq \frac{π^{\frac{n-1}{2}}}{2 Γ\left(\frac{n+1}{2}\right)}\c…

math.MG2020★ 5 cited

Extreme problems for convex curves with given relative Chebyshev radius

Vitor Balestro, Horst Martini, Yurii Nikonorov +1

The paper is devoted to some extremal problems for convex curves and polygons in the Euclidean plane referring to the relative Chebyshev radius. In particular, we determine the rel…

math.FA2019★ 5 cited

Two Applications of Boolean Valued Analysis

A. G. Kusraev, S. S. Kutateladze

The paper contains two main results that are obtained by Boolean valued analysis. The first asserts that a universally complete vector lattice without locally one-dimensional bands…

math.DG2019★ 2 cited

Algebraic properties of bounded Killing vector fields

Ming Xu, Yu. G. Nikonorov

In this paper, we consider a connected Riemannian manifold where a connected Lie group acts effectively and isometrically. Assume defines…

math.SP2019

Asymptotics of eigenvalues of large symmetric Toeplitz matrices with smooth simple-loop symbols

A. A. Batalshchikov, S. M. Grudsky, I. S. Malisheva +3

This paper is devoted to the asymptotic behavior of all eigenvalues of Symmetric (in general non Hermitian) Toeplitz matrices with moderately smooth symbols which trace out a simpl…

math.DG2019★ 6 cited

Spectral properties of Killing vector fields of constant length

Yu. G. Nikonorov

This paper is devoted to the study of properties of Killing vector fields of constant length on Riemannian manifolds. If is a Lie algebra of Killing vector fields on…

physics.flu-dyn2018★ 6 cited

On the stability of the Couette-Taylor flow between rotating porous cylinders with radial flow

Konstantin Ilin, Andrey Morgulis

We study the stability of the Couette-Taylor flow between porous cylinders with radial throughflow. It had been shown earlier that this flow can be unstable with respect to non-axi…

math.DG2018★ 21 cited

Geodesic Orbit Riemannian Structures on

Carolyn S. Gordon, Yuriĭ G. Nikonorov

A geodesic orbit manifold is a complete Riemannian manifold all of whose geodesics are orbits of one-parameter groups of isometries. We give both a geometric and an algebraic chara…

math.DG2018★ 6 cited

On homogeneous geodesics and weakly symmetric spaces

V. N. Berestovskii, Yu. G. Nikonorov

In this paper, we establish a sufficient condition for a geodesic in a Riemannian manifold to be homogeneous, i.e. an orbit of an -parameter isometry group. As an application of…

math.DG2017★ 13 cited

On invariant Riemannian metrics on Ledger-Obata spaces

Y. Nikolayevsky, Yu. G. Nikonorov

We study invariant metrics on Ledger-Obata spaces . We give the classification and an explicit construction of all naturally reductive metrics, and also show…

math.DG2017★ 20 cited

Geodesic orbit Riemannian spaces with two isotropy summands. I

Zhiqi Chen, Yu. G. Nikonorov

The paper is devoted to the study of geodesic orbit Riemannian spaces that could be characterize by the property that any geodesic is an orbit of a 1-parameter group of isometries.…

math.DG2016★ 20 cited

On left-invariant Einstein Riemannian metrics that are not geodesic orbit

Yu. G. Nikonorov

In this paper we prove that the compact Lie group admits a left-invariant Einstein metric that is not geodesic orbit. In order to prove the required assertion, we develop som…

math.DG2016★ 11 cited

Invariant Einstein metrics on Ledger-Obata spaces

Zhiqi Chen, Yuriĭ Nikonorov, Yulia Nikonorova

In this paper, we study invariant Einstein metrics on Ledger-Obata spaces . In particular, we classify invariant Einstein metrics on $F^4/\operatorname{…

math.DG2015★ 7 cited

Invariant Einstein metrics on generalized Wallach spaces

Zhiqi Chen, Yu. G. Nikonorov

Invariant Einstein metrics on generalized Wallach spaces have been classified except . In this paper, we give a survey on the study of inva…

math.FA2015★ 4 cited

Narrow Orthogonally Additive Operators on Lattice-Normed Spaces

Xiao Chun Fang, Marat Pliev

The aim of this article is to extend results of M.~Popov and second named author about orthogonally additive narrow operators on vector lattices. The main object of our investigati…

math.FA2015

Domination Problem for Narrow Orthogonally Additive Operators

Marat A. Pliev

The "Up-and-down" theorem which describes the structure of the Boolean algebra of fragments of a linear positive operator is the well known result of the operator theory. We prove…

math.FA2014★ 5 cited

Quasidifferentials in Kantorovich Spaces

E. K. Basaeva, A. G. Kusraev, S. S. Kutateladze

This is an overview of the quasidifferential calculus for the mappings that arrive at Kantorovich spaces. The necessary optimality conditions are also derived for multiple criteria…