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Двуслойные интервальные взвешенные графы в оценке рыночных рисков
Компьютерные исследования и моделирование. 2014. Т. 6. № 1. С. 159–166.
Dmitriev A., Markov N.
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
Smirnov A., Демографическое обозрение 2025 Т. 12 № 2 С. 35–68
The article summarizes the application of the network approach to the analysis of migration flows in Russia from the late Soviet period to 2023. Eleven datasets on international, interregional and intermunicipal migration flows were compiled. The data sources include the 1989, 2002, 2010, 2020 (2021) population censuses, vital statistics for 2015-2023 and the “digital traces” ...
Added: March 18, 2026
Дистель Р., М.: МЦНМО, 2024.
С момента выхода первого издания на английском языке в 1997 году книга известного математика, профессора Гамбургского университета Рейнгарда Дистеля стала основным учебником по теории графов во многих университетах, выдержав к настоящему времени пять изданий, перевод последнего из которых предлагается читателю. Уникальность учебника в его глубине при относительно небольшом объёме: в книге найдутся задачи как доступные ...
Added: January 25, 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
Rubchinskiy A., Chubarova D., / Series WP7 "Математические методы анализа решений в экономике, бизнесе и политике". 2025. No. WP7/2025/01.
The article examines one of the most famous examples of socio-economic systems, characterized by significant uncertainty – the S&P-500 stock market, where shares of 500 largest US companies are traded. No assumptions are made about the probabilistic characteristics of the stock market. A flexible algorithm for daily trading has been developed, based on both known fixed data ...
Added: November 9, 2025
Shestakova L. V., Семакин И. Г., Залогова Л. А. et al., М.: Просвещение, 2024.
The textbook is intended for studying computer science at the basic level in the 9th grade of general education organizations. The textbook contains the theoretical course material, questions and assignments for consolidation of knowledge. At the end of each chapter, the system of basic concepts of this chapter is presented schematically. The textbook is part ...
Added: July 7, 2025
Makeeva N., Экономика и математические методы 2026 Т. 62 № 2 С. 58–72
This study analyzes the accuracy of nowcasting and short-term forecasting models for annualized quarterly GDP growth rates in 33 developing countries over the period from Q1 2013 to Q4 2023. The research evaluates the out-of-sample accuracy of various models (MIDAS, MFBVAR, DFM, regularization-based models, a classical pairwise regression and first-order autoregression model) using the last ...
Added: April 19, 2025
Makeeva N., Прикладная эконометрика 2025 Т. 79 С. 27–49
The paper presents the results of an accuracy analysis of nowcasting models for Russia’s GDP and its components based on usage data for the period from the first quarter of 2014 to the third quarter of 2023. The novelty of the study lies in comparing the accuracy of various models — MIDAS, MFBVAR, DFM models, ...
Added: April 19, 2025
Кочкаров А. А., Yatskin D., Кочкаров Р. А., М.: КноРус, 2021.
Содержит основные сведения и задачипо теории графов, а также описание ключевых моделей, связанных с графами и сетями, с рассмотрением прикладных аспектов их применения. Для студентов бакалавриата, обучающихся по направлению "Экономика". ...
Added: March 8, 2025
Lyskov D., Доценко В., Келти А., Algebraic Combinatorics 2024 Vol. 7 No. 3 P. 801–842
Added: July 1, 2024
Makeeva N., Stankevich I., Любайкин Н. С., Вопросы экономики 2024 № 3 С. 120–142
In this paper the following models are compared: restricted and unrestricted MIDAS-models (mixed data sampling models), MFBVAR-model (mixed frequency Bayesian vector autoregression), Linear model with regularization (MIDAS_L1-, MIDAS_L2- and MIDAS_PC-model) and dynamic factor model. The results are compared with classical autoregression as a benchmark. Production indices for different industries and indicators characterizing Russian GDP and ...
Added: February 2, 2024
Ayzenberg A., Beketov M., Magaj G., / Series arxiv:math.AT "arxiv Algebraic Topology". 2023.
In this paper we study the nerves of two types of coverings of a sphere $S^{d-1}$: (1) coverings by open hemispheres; (2) antipodal coverings by closed hemispheres. In the first case, nerve theorem implies that the nerve is homotopy equivalent to $S^{d-1}$. In the second case, we prove that the nerve is homotopy equivalent to ...
Added: October 5, 2023
Vlasenko D., Zaikin A., Zakharov D., Известия высших учебных заведений. Прикладная нелинейная динамика 2023 Т. 31 № 5 С. 661–669
Because the brain is an extremely complex hypernet of interacting macroscopic subnetworks, full-scale analysis of brain activity is a daunting task.Nevertheless,this task can be greatly simplified by analysing the correspondence between various patterns of macroscopic brain activity, forex ample,through functional magneticresonance imaging(fMRI) scans, and the performance of particular cognitive tasks or pathological states.The purpose of ...
Added: October 4, 2023
Miasnikof P., Shestopaloff A., Pitsoulis L. et al., Journal of Complex Networks 2022 Vol. 10 No. 1 Article cnac003
In this study, we compare distance measures with respect to their ability to capture vertex community structure and the scalability of their computation. Our goal is to find a distance measure which can be used in an aggregate pairwise minimization clustering scheme. The minimization should lead to subsets of vertices with high induced subgraph density. ...
Added: November 21, 2022
Zhemkov M., Деньги и кредит 2022 № 2 С. 79–104
This paper presents an approach to the estimation of monthly GDP growth in Russia using temporal disaggregation. This method represents a balanced view of the current economic situation that relies on a model framework and encompasses all economic sectors. The paper makes a meaningful contribution to the existing academic literature on the topic by combining ...
Added: July 9, 2022
Maxim S. Akatov, Alexander L. Tuv, , in: Proceedings of the 2021 IEEE International Conference "Quality Management, Transport and Information Security, Information Technologies" (IT&QM&IS).: IEEE, 2021. Ch. 4 P. 192–194.
This article is concerned with the analysis of the emergence of possible security threats to the object of
informatization. The main types of threats and approaches to their definition are presented and described.
Recommendations are given for determining their application regarding the object of informatization. ...
Added: January 25, 2022