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О концентрации значений j-хроматических чисел случайных гиперграфов
Доклады Российской академии наук. Математика, информатика, процессы управления (ранее - Доклады Академии Наук. Математика). 2023. Т. 509. № 1. С. 28–35.
Денисов И. О., Shabanov D. A.
The paper deals with the study of the limit distribution of the j-chromatic numbers of a random k-uniform hypergraph in the binomial model H(n,k,p). We consider the sparse case when the expected number of edges is a linear function of the number of vertices n, i.e. is equal to cn for c>0 not depending on n. We prove that for all large enough values of c, the j-chromatic number of H(n,k,p) is concentrated in one or two consecutive numbers with probability tending to 1.
Aleksei Samarin, Nazarenko A., Nazarenko D. et al., Machine Learning and Knowledge Extraction 2026 Vol. 8 No. 10 Article 330
Automated microscopic image analysis is essential for quantitative microbiology, yet manual acquisition and generic recognition models struggle with morphological variability and scene artifacts. We address both ends of this pipeline. First, we present a low-cost, open-source acquisition system, based on an Arduino UNO R3 microcontroller and NEMA 17 stepper motors, that automates focusing, magnification, and ...
Added: October 14, 2026
Parkhomenko V., Kulikova S., Buzmakov A. V., Lobachevskii Journal of Mathematics 2026 Vol. 47 No. 6 P. 2979–2992
The stability of formal concepts and its generalization as robustness are considered in the paper. We use an approximation of stability in the form of Δ-measure for fast calculations. A computationally efficient method for calculating robustness based on subcontexts is presented. We also present a new method to analytically evaluate the number of preimages for ...
Added: October 14, 2026
Kuznetsov A. P., Sedova Y. V., Sataev I. R. et al., Mathematics and Computers in Simulation 2027 Vol. 2 P. 574–592
Universal bifurcation structures on the parameter plane of nonlinear systems, known as shrimps, are discussed. An overview of numerous examples from various fields of science is given. Shrimps are typical for both maps of different dimensions and flows. The varieties of shrimp are discussed and relevant examples are given. The similarity property on the parameter ...
Added: October 14, 2026
Gusein-Zade S., Campillo A., Delgado F., Mathematische Zeitschrift 2026 Vol. 314 No. 1 P. 1–22
For a subfield $\K$ of the field $\C$ of complex numbers, we consider curve and divisorial valuations on the algebra $\K[[x,y]]$ of formal power series in two variables with the coefficients in $\K$. We compute the semigroup Poincar\'e series and the classical Poincar\'e series of a (discrete, rank one) valuation on it. ...
Added: October 13, 2026
Mishuris G., Meylan M. H., Pelinovsky E., Journal of Fluid Mechanics 2026 Vol. 1045 Article A4
In this paper, we revisit the classic problem of a wave field on a sloping beach of an arbitrary angle and propose a general approach that allows the computation of regular solutions of the problem regardless of the angle. We use the Mellin-transform technique, reducing the problem to singular integral equations with fixed-point singularities of ...
Added: October 12, 2026
Gusein-Zade S., М.: МЦНМО, 2026.
Книга содержит курс лекций по дифференциальной геометрии и топологии, читавшихся автором на механико-математическом факультете МГУ в разные годы. В дополнениях приводятся некоторые сюжеты (связности в расслоениях, теорема Фробениуса, производные Ли и др.), которые были включены в курс в отдельные годы либо содержались в аналогичных курсах лекций в Независимом московском университете.
Для студентов математических и физических специальностей. ...
Added: October 12, 2026
Брычков М. Е., Незнанов А.А., Программирование 2026 № 4 С. 50–66
The matrix profile (MP) quickly became one of the most important time series preprocessing methods when it was introduced in 2016, facilitating the solution of a wide range of time series analysis problems, in particular anomaly and pattern detection problems. The high significance has led to the emergence of various tools for MP calculating, but ...
Added: October 9, 2026
М.: Юрайт, 2026.
The Collection of Olympiad Problems (COP) in Probability Theory and Mathematical Statistics (PTMS) is offered as a teaching aid primarily for university students and faculty as a developmental supplementary resource, expanding the range of problems to be solved in lectures, seminars, and out-of-class independent work with students in various formats, including (as the title suggests) ...
Added: October 9, 2026
Aleskerov F. T., Вайншток А. П., Делахова А. М. et al., Информационные процессы 2026 Т. 26 № 3 С. 895–913
The development and effective management of territorial entities are priority issues for all states, particularly in the context of the digital transformation of public administration. Over the past decade, the integration of information technologies into municipal and regional planning has significantly altered approaches to strategic development, service delivery, and public engagement. This paper describes the ...
Added: October 9, 2026
Kupavskii A., Noskov F., Forum of Mathematics, Sigma 2026 Vol. 14 Article 124
We call a family of $s$ sets $\{F_1, \ldots, F_s\}$ a sunflower with $s$ petals if, for any distinct $i, j \in [s]$, one has $F_i \cap F_j = \cap_{u = 1}^s F_u$. The set $C = \cap_{u = 1}^s F_u$ is called the {\it core} of the sunflower. It is a classical result of ...
Added: October 8, 2026
Flamarion M. V., Pelinovsky E., Chaos, Solitons and Fractals 2026 Vol. 213 No. 2 Article 119245
This article concerns the study of modulational instability in the rotated-modified Gardner–Whitham (rmGW) equation. This model incorporates both quadratic and cubic nonlinearities, similarly to the Gardner equation, while also retaining the fully dispersive character of the Whitham equation together with a large-scale dispersive term analogous to that in the Ostrovsky equation. Using a classical multiple-scale asymptotic expansion, we ...
Added: October 8, 2026
Люксембург А. А., УРСС, 2005.
Изучается возможность автоматизированного построения математических теорий. Рассматривается дедуктивная система, основанная на языке логики предикатов первого порядка, объектами системы являются математические выражения или формулы, которые описывают математические объекты или их свойства. В дедуктивной системе выводятся математические определения и теоремы. Для доказательства теорем используются методы автоматического доказательства. Разработан алгоритм, выводящий часть формул системы. Для решения задачи используется аппарат математической ...
Added: October 7, 2026
Aleskerov F. T., Chaika E., Дерендяев А. Б. et al., Procedia Computer Science 2026 No. 287 P. 590–595
Under conditions of dynamic socio-economic changes, effective planning and decision-making are key factors in ensuring a high quality of life for the population in territories. This paper presents a decision support system for territorial administrations for the development and implementation of sustainable development strategies, using one of the regions of the Russian Federation – the ...
Added: October 7, 2026
Bernardin C., Gonçalves P., Olla S., Mathematical Physics Analysis and Geometry 2024 Vol. 27 No. 7
We consider the macroscopic limit for the space-time density fluctuations in the open symmetric simple exclusion in the quasi-static scaling limit. We prove that the distribution of these fluctuations converge to a gaussian space-time field that is delta correlated in time but with long-range correlations in space. ...
Added: October 6, 2026
Bernardin C., Chhaibi R., Najnudel J. et al., Probability Theory and Related Fields 2026 Vol. 195 P. 1823–1875
We study the celebrated Shiryaev-Wonham filter (Wonham, W.M., in J. Soc. Ind. Appl. Math. 347–369, 1964) in its historical setup, where the hidden Markov jump process has two states. We are interested in the weak noise regime for the observation equation. Interestingly, this becomes a strong noise regime for the filtering equations. Earlier results of ...
Added: October 5, 2026
Ismailov A., Spiridonov V., Успехи математических наук 2026 Т. 81 № 5 С. 183–184
Получена новая формула для цепной дроби Аски–Вильсона в форме отношения двух q-гипер-геометрических рядов. ...
Added: October 5, 2026
Здержиков Н. И., Shabanov D. A., Степанов И. Д., Чебышевский сборник 2026 Т. 27 № 3 С. 74–90
In this article we study one of many possible generalizations of the notion of a proper coloring when applied to hypergraphs. Namely, the so called fractional \((a:b)\)-colorings are dealt with. Such coloring is a way to match each vertex of the hypergraph with exactly \(b\) colors (out of \(a\) available ones), in a manner that ...
Added: September 28, 2026
Кошелев М. М., Shabanov D. A., Шайхеева Т. М., Успехи математических наук 2025 Т. 80 № 1(481) С. 161–162
In the paper we obtain new estimates of threshold probabilities for the properties of fractional (r:2)-colorings of a random hypergraph in the binomial model H(n,k,p). ...
Added: February 4, 2025
Tiapkin D., Shabanov D. A., Доклады Российской академии наук. Математика, информатика, процессы управления (ранее - Доклады Академии Наук. Математика) 2023 Т. 512 № 1 С. 52–57
The paper deals with the structure of the set of panchromatic colorings with three colors of a random hypergraph in the uniform model $H(n,k,m)$. It is well known that the property of the existence of a panchromatic coloring with given number of colors $r$ has the sharp threshold, i.e. there exists the threshold value $\widehat{m}_r=\widehat{m}_r(n)$ ...
Added: November 30, 2023
Zakharov P., Shabanov D. A., Успехи математических наук 2023 Т. 78 № 6 (474) С. 183–184
We obtain very accurate estimates for the threshold probability of fractional (4:2)-colorability property in a random k-uniform hypergraph in the binomial model H(n,k,p). ...
Added: November 30, 2023
Alina Khuzieva, Matveeva T., Dmitry Shabanov, Moscow Journal of Combinatorics and Number Theory 2023 Vol. 12 No. 1 P. 57–88
The paper deals with strong r-colorings of a random k-uniform hypergraph in the binomial model H(n,k,p). A vertex coloring is said to be strong for a hypergraph if any two vertices that share a common edge are colored with distinct colors. We consider the sparse case when the expected number of edges is equal to cn and the values r≥k≥3, c>0 remain constant ...
Added: April 10, 2023
A. E. Khuzieva, Journal of Mathematical Sciences 2022 Vol. 262 No. 4 P. 581–590
We give probabilistic constructions of hypergraphs with large girth that do not admit panchromatic colorings. We prove new upper bounds on the minimal values of the number of edges and the maximum vertex degree in such hypergraphs. ...
Added: April 9, 2023
Демидович Ю. А., Shabanov D. A., Теория вероятностей и ее применения 2022 Т. 67 № 2 С. 223–246
Работа посвящена изучению предельной концентрации значений хроматического числа случайного гиперграфа в биномиальной модели H(n,k,p). Доказано, что при фиксированном k>2 и не слишком быстро растущем значении n^{k-1}p хроматическое число H(n,k,p) с вероятностью, стремящейся к 1, принадлежит множеству из некоторых двух соседних значений. Кроме того, показано, что при чуть более сильных ограничениях на рост n^{k-1}p данные значения ...
Added: January 11, 2023
Матвеева Т. Г., Khuzieva A., Shabanov D. A., Доклады Российской академии наук. Математика, информатика, процессы управления (ранее - Доклады Академии Наук. Математика) 2022 Т. 502 С. 37–41
The paper deals with the study of the probability threshold for the property of strong colorability with given number of colors of the random k-uniform hypergraph in the binomial model H(n,k,p). A vertex coloring of a hypergraph is said to be strong if any edge does not have two vertices of the same color under ...
Added: January 11, 2023