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Институт математики и механики им. Н.И. Лобачевского: Recent submissions

Now showing items 21-40 of 302

Multi-scale hierarchy from multidimensional gravity

Bronnikov Kirill Aleksandrovich; Popov Arkadiy Aleksandrovich; Rubin Sergey Georgievich (2023)

We discuss the way of solving the hierarchy problem. We show that starting at the Planck scale, the three energy scales - inflationary, electroweak and the cosmological ones can be restored. A mechanism for generating small ...
Оператор блочного проектирования на алгебре измеримых операторов

Бикчентаев Айрат Мидхатович (2023)

Исследован оператор блочного проектирования на алгебре измеримых операторов. Усилен и уточнен один известный пример.
Concerning the Theory of τ -measurable Operators Affiliated to a Semifinite von Neumann Algebra, II

Bikchentaev Airat Midkhatovich (2023)

We generalized the C. R. Putnam theorem (1951), see also Problem 188 in the book (P. R. Halmos, A Hilbert space problem book. D. van Nostrand company, inc., London, 1967):.
Automorphisms of dense subrings of the endomorphism ring of a free module

Abyzov Adel Nailevich; Maklakov Aleksandr Dmitrievich (2023)
К теории tau-измеримых операторов, присоединенных к полуконечной алгебре фон Неймана. II

Бикчентаев Айрат Мидхатович (2023)

Пусть алгебра фон Неймана M операторов действует в гильбертовом пространстве H, t - точный нормальный полуконечный след на M. Пусть S(M,t) -- *-алгебра всех t-измеримых операторов и X, Y лежат в S(M,t). Тогда (i) ...
Locally algebraic linear operators and their centralizers

Abyzov Adel Nailevich; Maklakov Aleksandr Dmitrievich (2023)
Commutators and hyponormal operators on a Hilbert space

Akhmadiev Marat Gabdelbyarovich; Alhasan Khasan; Bikchentaev Airat Midkhatovich; Ivanshin Petr Nikolaevich (2023)

Let H be an innite-dimensional Hilbert space over the field C, B(H) be the ∗-algebra of all linear bounded operators on H. An operator A ∈ B(H) is a commutator, if A = [S, T ] = ST - T S for some S, T ∈ B(H). Let X, Y ∈ ...
Symmetries of the Black-Scholes-Merton Equation for European Options

Shurygin Vadim Vadimovich (2023)

The aim of the present paper is the clarification of the result of A.Paliathanasis, K.Krishnakumar, K.M.Tamizhmani and P.G.L.Leach on the symmetry Lie algebra of the Black-Scholes-Merton equation for European options.
ОСОБЕННОСТИ ФАЗОВЫХ ТРАЕКТОРИЙ В ПОЛНОЙ МОДЕЛИ КОСМОЛОГИЧЕСКОЙ ЭВОЛЮЦИИ НА ОСНОВЕ КЛАССИЧЕСКОГО СКАЛЯРНОГО ПОЛЯ С ХИГГСОВЫМ ПОТЕНЦИАЛОМ

Самигуллина Алсу Ринатовна (2023)
Flexible extra dimensions

Petryakova Polina; Popov Arkadiy Aleksandrovich; Rubin Sergey Georgievich (2023)

This paper discusses the origin of the small parameters with the aim of explaining the Hierarchy problem. The flexible extra dimensions are an essential tool in the process by which physical parameters are formed. The ...
Commutators in $C*$-algebras and traces

Bikchentaev Airat Midkhatovich (2023)

Let $\mathcal{H}$ be a Hilbert space, $\dim \mathcal{H}= +\infty$. Let $X=U|X|$ be the polar decomposition of an operator $X\in \mathcal{B}(\mathcal{H})$. Then $X$ is a non-commutator if and only if both $U$ and ...
The algebra of thin measurable operators is directly finite

Bikchentaev Airat Midkhatovich (2023)

Let $\mathcal{M}$ be a semifinite von Neumann algebra on a Hilbert space $\cH$ equipped with a faithful normal semifinite trace $\tau$, $S(\mathcal{M},\tau)$ be the ${}^*$-algebra of all $\tau$-measurable operators. Let ...
Методичесие рекомендации по решению конечномерных экстремальных задач

Агачев Юрий Романович; Ожегова Алла Вячеславовна (2022)
Vacuum Polarization of a Quantized Scalar Field in the Thermal State on the Short Throat Wormhole Background

Попов Аркадий Александрович; Лисенков Дмитрий Сергеевич (2023)

Vacuum polarization of a scalar field on the short throat wormhole background is investigated. The scalar field is assumed to be massless, having an arbitrary coupling to the scalar curvature of spacetime. In addition, ...
The topologies of local convergence in measure on the algebra of measurable operators

Bikchentaev Airat Midkhatovich (2023)

Given a von Neumann algebra $M$ of operators on a Hilbert space $H$ and a faithful normal semifinite trace $\tau$ on $M$, denote by $S(M, \tau)$ the *-algebra of $\tau$-measurable operators. We obtain a sufficient condition ...
Топологии локальной сходимости по мере в алгебрах измеримых операторов

Бикчентаев Айрат Мидхатович (2023)

Пусть алгебра фон Неймана $\mathcal{M}$ операторов действует в гильбертовом пространстве $\mathcal{H}$, $\tau$ -- точный нормальный полуконечный след на $\mathcal{M}$, $S(\mathcal{M}, \tau )$ -- *-алгебра $\tau$-измеримых ...
On the Inner Radius for Multiply Connected Domains

Казанцев Андрей Витальевич; Киндер Михаил Иванович (2022)
On extrema of the Mityuk radius for doubly connected domains

Kazantsev Andrei Vitalievich; Kinder Mihail Ivanovich (2022)

We study extrema of the Mityuk radius depending on the choice of the canonical domain. Turning to the doubly connected case allows us to use the explicit form of mapping functions onto canonical domains. We obtain the ...
Неравенства на плоскости для жесткости кручения

Салахудинов Рустем Гумерович (2022)
Monotone functionals on level sets of the distance function and inequalities for Euclidean moments

Salakhudinov Rustem Gumerovich (2022)

Now showing items 21-40 of 302

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