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October 1, 2026
HSE Researchers Show How Congenital Motor Disorders Affect Brain Development
Researchers from HSE University’s Institute for Cognitive Neuroscience have synthesised the findings of their previous studies on brain development in children with obstetric brachial plexus palsy and arthrogryposis. Their analysis shows that impaired motor function in early childhood not only limits children’s motor experience but also affects memory, categorical thinking, and information processing. The study has been published in Frontiers in Psychology.
October 1, 2026
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Russian universities, with the participation of HSE University, Sber, and Z-union, have developed a neural network that can simultaneously assess the risk of 15 types of pathology from retinal photographs, including not only eye diseases but also cardiovascular conditions. The AI system can help clinicians detect potentially concerning changes at an early stage, identify signs reflecting the condition of retinal blood vessels, and determine whether a patient may need further examination. The paper has been published in Frontiers in Medicine.
September 30, 2026
'We Did Not Limit the Time for Questions'
The International Laboratory for Supercomputer Atomistic Modelling and Multi-Scale Analysis at HSE University held a major conference on molecular dynamics. Participants had the opportunity to attend all the presentations, while speakers were given as much time as they needed to answer questions. The HSE News Service interviewed Grigory Smirnov, Head of the Laboratory, and Genri Norman, Chief Research Fellow, about the conference preparations and the discussions it generated.

 

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?

О геометрии расслоенных псевдоримановых многообразий

С. 50–54.
Yakovlev E., Гончар Т. А.

The relations between the geometric properties of fibered pseudo-Riemannian manifolds and their
bases are investigated. Special attention is paid to Lorentzian manifolds and causality conditions.
Keywords: principal bundle, G-connection, lorentzian manifold, space-time, causality condition

Language: Russian
Full text
Text on another site
Keywords: principal bundleG-connectionLorentzian manifoldspace-timecausality conditionглавное расслоениеG-связностьлоренцево многообразиеусловие причинностипространство-время
Publication based on the results of:
Теория динамических систем и ее приложения (2021)

In book

Международная конференция «Современная геометрия и её приложения - 2019»: сборник трудов
Каз.: Издательство Казанского университета, 2019.
Similar publications
Lorentzian Principal Bundles with Compact Structure Groups and Causal Properties
Yakovlev E., Maksimov D. A., Mathematical notes 2026 Vol. 120 No. 3 P. 483–496
Smooth principal bundles whose total spaces and bases are time oriented Lorentzian manifolds and whose projections are Lorentzian submersions preserving time orientations are studied. Previously, the authors showed that the chronologicity, causality, and stable causality always lift from the base to the space of a Lorentzian bundle. For strong causality and global hyperbolicity, this holds ...
Added: September 24, 2026
Causal Properties of Lorentzian Manifolds and Regular Coverings
D. A. Maksimov, Yakovlev E., Lobachevskii Journal of Mathematics 2024 Vol. 45 No. 8 P. 3924–3934
Regular coverings of Lorentzian manifolds are studied under the assumption that the covering map is isometric and preserves time orientation. Conditions for the covering manifold are obtained that are necessary and sufficient for the base to be chronological, causal, strongly or stable causal, and also globally hyperbolic manifold. As a corollary, statements are obtained that ...
Added: November 23, 2024
«Контрфинальность» в социологической теории: реконцептуализация понятия
Latypov I., Вестник Российского университета дружбы народов. Серия: Социология 2021 Т. 21 № 4 С. 697–710
Counterfinality is defined as unintended consequences of the uncoordinated actions of rationally acting individuals. Even before the concept was introduced by Sartre and developed by Elster, counterfinality was considered by many scholars. Some defined counterfinality as a type of social paradoxes and dilemmas, others-as an outcome of social interaction. Description and analysis of such social ...
Added: April 16, 2022
Coverings in the Category of Principal Bundles
Gonchar T., Yakovlev E., Russian Mathematics 2021 Vol. 65 No. 4 P. 22–43
Исследуется категория регулярных накрытий заданного гладкого главного расслоения. Под накрывающим отображением одного главного расслоения на другое понимается морфизм в категории главных расслоений, состоящий из накрывающих отображений структурных групп, тотальных пространств и баз. Основные результаты: построение инварианта регулярного накрытия, представляющего собой подпоследовательность гомотопической последовательности базового расслоения, теорема существования накрытия с заданным инвариантом, критерии морфизмов и изоморфизмов, ...
Added: September 21, 2021
Causal Properties of Fibered Space-Time
Yakovlev E., Gonchar T., Mathematical notes 2019 Vol. 106 No. 1 P. 118–132
On the space of a principal bundle, a Lorentzian metric and a time orientation are given that are invariant with respect to the action of the structure group. These objects form a fibered space-time and, in the case of spacelike fibers, induce the same structures on the base. The following causality conditions are discussed: chronology, causality, stable and ...
Added: October 7, 2019
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