Shabanov N., Kuricheva O., Kurbatova J. et al., / Series Working Papers SSRN "Department of Economics Ca’ Foscari University of Venice". 2026.
The carbon balance of an ecosystem is the difference between Gross Primary Productivity (GPP) and Ecosystem Respiration (Reco) as expressed by Net Ecosystem Exchange (NEE). While remote sensing retrievals of GPP have reached maturity, Reco estimation remains underexplored and ultimately cast bias on NEE. Here we present an end-to-end multi-scale analysis of the mechanism of ...
Added: August 21, 2026
Богатырев А. Б., Математический сборник 2023 Т. 214 № 3 С. 106–119
Рассматривается клеточное разбиение пространства модулей вещественных кривых рода 2 с отмеченной точкой на единственном вещественном овале. Клетки перечисляются определенными графами, веса которых описывают комплексную структуру на кривой. Показано, что стягивание ребра графа приводит к корневой особенности естественного отображения из весов графа в пространство модулей кривых. ...
Added: August 14, 2026
Ponomarenko A., / Series Computer Science "arxiv.org". 2025.
This paper addresses the challenge of merging hierarchical navigable small world (HNSW) graphs, a critical operation for distributed systems, incremental indexing, and database compaction. We propose three algorithms for this task: Naive Graph Merge (NGM), Intra Graph Traversal Merge (IGTM), and Cross Graph Traversal Merge (CGTM). These algorithms differ in their approach to vertex selection ...
Added: July 30, 2026
Piontkovski D., / Series arXiv "math". 2026.
A noncommutative projective variety is defined, following Artin and Zhang, by a graded coherent algebra 𝐴. The category of coherent sheaves is then the quotient qgr(𝐴) of the category of finitely presented graded modules by the subcategory of torsion modules. We consider the categorical and polynomial entropies of the Serre twist, that is, of the ...
Added: June 23, 2026
Piontkovski D., / Series arXiv "math". 2025.
If a symmetric multilinear algebra is weakly nil, then it is Engel. This result may be regarded as an infinite-dimensional analogue of the well-known Jacobian theorem, which states that if a polynomial mapping has a polynomial inverse, then its Jacobian matrix is invertible. This refines a theorem of Gerstenhaber and partially answers a question posed ...
Added: June 23, 2026
Shipilov F., Barnyakov A., Ivanov A. et al., / Series Physics "arxiv.org". 2026.
A fast simulation of the detector response is a vital task in high-energy physics (HEP). Traditional Monte-Carlo methods form the backbone of modern particle physics simulation software but are computationally expensive. We present a machine-learning-based approach to fast simulation of the Focusing Aerogel Ring Imaging Cherenkov (FARICH) detector response. Given a particle track and momentum, ...
Added: May 19, 2026
Derkacheva A., Sakirkina M., Kraev G. et al., /. 2026.
Comprehensive data on natural hazards and their consequences are crucial for effective for risk assessment, adaptation planning, and emergency response. However, many countries face challenges with fragmented, inconsistent, and inaccessible data, particularly regarding local-scale events. To address this data gap in Russia, we developed an end-to-end processing pipeline that scrapes news from various online sources, ...
Added: April 28, 2026
Pilé I., Deng Y., Shchur L., / Series arXiv "math". 2026. No. 2604.10254.
We investigate the spatial overlap of successive spin configurations in Markov chain Monte Carlo simulations using the local Metropolis algorithm and the Svendsen-Wang and Wolff cluster algorithms. We examine the dynamics of these algorithms for two models in different universality classes: the Ising model and the Potts model with three components. The overlap of two ...
Added: April 20, 2026
Gabdullin N., Androsov I., / Series Computer Science "arxiv.org". 2026.
Label prediction in neural networks (NNs) has O(n) complexity proportional to the number of classes. This holds true for classification using fully connected layers and cosine similarity with some set of class prototypes. In this paper we show that if NN latent space (LS) geometry is known and possesses specific properties, label prediction complexity can ...
Added: April 2, 2026
Starodubov K., Елистратов А. А., Громов Ю. Ю. et al., М.: Издательский дом Академии Жуковского, 2025.
Пособие представляет собой всестороннее руководство по теоретическим основам и практическому применению криптографических методов для защиты информации. В издании подробно рассматриваются современные алгоритмы шифрования, методы аутентификации, электронные подписи, а также принципы построения и функционирования криптографических протоколов. Особое внимание уделено вопросам оценки стойкости криптографических систем, нормативно-правовой базе и актуальным угрозам информационной безопасности. Пособие проиллюстрировано рассмотрением практических примеров. Большое внимание уделено вопросам методологического характера. Учебное пособие представляет ...
Added: February 27, 2026
Sorokin K., Beketov M., Онучин А. et al., / arxiv.org. Серия cs.SI "Social and Information Networks ". 2025.
Community detection in complex networks is a fundamental problem, open to new approaches in various scientific settings. We introduce a novel community detection method, based on Ricci flow on graphs. Our technique iteratively updates edge weights (their metric lengths) according to their (combinatorial) Foster version of Ricci curvature computed from effective resistance distance between the ...
Added: January 15, 2026
Petrovanov I., Sergeev A., / Series Computer Science "arxiv.org". 2025. No. 2512.18332.
Transport coding reduces message delay in packet-switched networks by introducing controlled redundancy at the transport layer: original packets are encoded into coded packets, and the message is reconstructed after the first successful deliveries, effectively shifting latency from the maximum packet delay to the -th order statistic. We present a concise, reproducible discrete-event implementation of transport coding in OMNeT++, including ...
Added: December 24, 2025
Hessian-based lightweight neural network for brain vessel segmentation on a minimal training dataset
Меньшиков И. А., Бернадотт А. К., Elvimov N. S., / Series arXie "Statistical mechanics". 2025.
Accurate segmentation of blood vessels in brain magnetic resonance angiography (MRA) is essential for successful surgical procedures, such as aneurysm repair or bypass surgery. Currently, annotation is primarily performed through manual segmentation or classical methods, such as the Frangi filter, which often lack sufficient accuracy. Neural networks have emerged as powerful tools for medical image ...
Added: December 1, 2025
Artamkin I., / Series arXiv "math". 2023.
A collection of vectors in a real vector space is called a unimodular system if any of its maximal linearly independent subsets generates the same free abelian group. This notion is closely connected with totally unimodular matrices: rows or columns of a totally unimodular matrix form a unimodular system and the matrix of coefficients of ...
Added: November 1, 2025
Khestanov R., Suvalko A., Социологическое обозрение 2025 Т. 24 № 2 С. 164–189
The article examines the genesis of the concept of novelty and argues that modern difficulties in defining and identifying the new are a symptom of a semantic crisis, which is based on the loss of strategic normativity of novelty in modern culture. Three historical-semantic models of novelty are identified and analyzed: cyclical (characteristic of prehistoric ...
Added: June 29, 2025
Polyakov N. L., Доклады Российской академии наук. Математика, информатика, процессы управления (ранее - Доклады Академии Наук. Математика) 2025 Т. 522 № 1 С. 40–49
The paper describes a new method for constructing graphs without triangles and with an arbitrarily large chromatic number. The properties of various types of ultrafilter extensions of functions and predicates are used to justify the method. ...
Added: June 3, 2025
Воднев А. А., Информационно-управляющие системы 2025 № 1 С. 23–28
Введение: уменьшение кодового расстояния представляет собой важный инструмент для решения некоторых задач в теории информации и криптографии. Например, в криптографических кодовых системах, таких как система Мак-Элиса, снижение кодового расстояния напрямую влияет на уменьшение длины открытого ключа, что является критически важным фактором для повышения эффективности и применимости кодовых криптосистем. Цель: разработать алгоритм построения матриц, способный эффективно уменьшать расстояние кода. Результаты: предложен ...
Added: April 4, 2025
Кочкаров А. А., Yatskin D., Кочкаров Р. А., Управленческие науки 2020 Т. 10 № 1 С. 102–111
An important parameter of the transport and logistics task is the structural stability of the system to external influences. In modern literature, the concept of structural stability is defined in its own way for each individual task, as a result of which there are difficulties in applying the developed methods to new problems. The transport ...
Added: March 7, 2025
Кочкаров А. А., Yatskin D., Кочкаров Р. А., Теоретическая и прикладная экономика 2020 № 1 С. 1–9
This article is dedicated to designing of the transport and logistics systems with built-in resistance to structural failures. The sustainability indicators reflect the impact of the failure of one or several hubs (communication channels) upon working capacity of the already functioning system. In the process of designing the system, the sustainability indicators also provide opportunities ...
Added: March 7, 2025
Кочкаров А. А., Yatskin D., Кочкаров Р. А., Нелинейный мир 2019 Т. 17 № 5 С. 14–23
Постановка проблемы. Понятие структурной устойчивости определяется применительно для каждой индивидуальной задачи, в результате чего появляются сложности применения разработанных методов в новых задачах. Структурное воздействие на транспортно-логистическую систему представлено элементарными событиями над графом, в том числе их суперпозицией. В работе используется понятие структурного разрушения графа, что подразумевает разбиение графа на несвязные компоненты.
Цель. Рассмотреть фундаментальный подход к ...
Added: March 7, 2025
М.: Математический институт им. В. А. Стеклова РАН, 2024.
This volume is dedicated to the 80th birthday of Victor Matveevich Buchstaber, Corresponding Member of the Russian Academy of Sciences. The volume includes articles on topology, geometry, combinatorics, and mathematical physics, the areas in which V. M. Buchstaber is a recognized world leader and the head of an active scientific school. Most of the articles are written ...
Added: January 15, 2025
Veryovkin Y., Рахматуллаев Т. А., Математические заметки 2024 Т. 116 № 1 С. 10–33
We study the lower central series of a right-angled Coxeter group RCK and the corresponding associated graded Lie algebra L(RCK) and describe the basis of the fourth graded component of L(RCK) for any K. ...
Added: January 15, 2025
[б.и.], 2023.
The collection contains materials presented at the XXII International Conference "Algebra, Number Theory, Discrete Geometry and Multiscale Modeling: modern problems, applications and problems of history", dedicated to the 120th anniversary of the birth of Academician Andrei Nikolaevich Kolmogorov and the 60th anniversary of the opening of boarding school No. 18 at Moscow University. The conference ...
Added: April 24, 2024
Providence: AMS, 2023.
This book is a translation from Russian of Part III of the book Mathematics via Problems: From Olympiads and Math Circles to Profession. Part I, Algebra, and Part II, Geometry, have been published in the same series.
The main goal of this book is to develop important parts of mathematics through problems. The authors tried to put together sequences ...
Added: March 3, 2024