?
Эффективный поиск минимального дерева на точках пространства в $l_1$-норме
Математические заметки. 2025. Т. 117. № 5. С. 672–679.
Prikhodko Artem, Kubrak D., Compositio Mathematica 2026 Vol. 162 No. 6 P. 1377–1438
In this follow-up paper we show that smooth Hodge-proper stacks over O𝐾 are ℚ𝑝-locally acyclic: namely the natural map between étale ℚ𝑝-cohomology of the algebraic and Raynaud generic fibers is an equivalence. This establishes the ℚ𝑝-case of general conjectures made in D. Kubrak and A. Prikhodko [p-adic Hodge theory for Artin stacks, Mem. Amer. Math. ...
Added: September 7, 2026
Ismailov A., Constructive Approximation 2026
The measure of the positivity set {x ∈ [0; 2π] | f (x) > 0} of a trigonometric polynomial f is bounded from below by the Motzkin density.
We generalize the bound to polynomials in several variables and almost periodic functions.
We then use these generalizations to extend known results on Taikov’s problem. ...
Added: September 7, 2026
Alshanskaia E., Portnova G., Liaukovich K. et al., Frontiers in Neuroscience 2024 Vol. 18
Added: September 7, 2026
Зуенко Д. О., Trofimova E., Хайдарова И., IEEE Access 2026 Vol. 14 P. 121339–121357
Oil spill segmentation in Synthetic Aperture Radar (SAR) images is limited by noisy annotations in publicly available datasets and by architectural choices that interact with label quality in opposing directions. First, we introduce a manually refined version of the Deep-SAR Oil Spill (SOS) dataset, in which 36.25% of masks are corrected for false positives, missed ...
Added: September 7, 2026
Kucheryavyy P., Математические заметки 2026 Т. 2026 № 120 С. 380–401
В работе изучаются перестановки, возникающие при упорядочивании по возрастанию дробных долей произведений элементов фиксированной целочисленной последовательности на вещественный параметр. Исследуется количество различных перестановок, которые можно получить таким образом при изменении этого параметра от нуля до единицы. ...
Added: September 7, 2026
Неверов В. Д., Красавин А. В., Vagov A. et al., Physical Review B: Condensed Matter and Materials Physics 2026 Vol. 113 P. 1–6
We develop a neural network approach to solve the self-consistent Bogoliubov-de Gennes equations in strongly disordered s-wave superconductors. The method accurately reproduces inhomogeneous gap distributions and generalizes to system sizes far larger than those used in training. It reduces computational scaling from O(N6 ) to O(N2), enabling quantitative analysis of percolation phenomena and the superconductor-insulator ...
Added: September 5, 2026
Sheshukova M., Durmus A., Khusainov M. et al., Statistics 2026 P. 1–25
In this paper, we consider the problem of Gaussian approximation for the online linear regression task. We derive the corresponding rates for the setting of a constant stepsize and study the explicit dependence of the convergence rate on the problem dimension d and quantities related to the design matrix. When the number of iterations n is known in advance, ...
Added: September 4, 2026
Proceedings of Machine Learning Research , 2026.
Added: September 4, 2026
Осипов Д.В., Математический сборник 2026 Т. 217 № 9 С. 130–146
Изучаются законы взаимности, связанные с комплексными линейными расслоениями на расслоениях на ориентируемые окружности. В частности, доказывается следующий закон взаимности. Пусть B – комплексное многообразие и πi:Mi→B – расслоение на ориентируемые окружности, где индекс i пробегает конечное множество. Пусть Li и Ni – комплексные линейные расслоения на каждом многообразии Mi. Закон взаимности утверждает, что сумма всех элементов (πi)∗(c1(Li)∪c1(Ni)), где (πi)∗ – ...
Added: September 3, 2026
Khodadoust J., Kulikova S., Khodadoust F., Biomedical Signal Processing and Control 2027 Vol. 129 P. 111284–111284
Acute ischemic stroke (AIS) analysis from two-dimensional (2D) clinical imaging is hindered by uncontrolled slice tilt and geometric inconsistencies that violate the assumptions of pose-agnostic deep learning (DL) models. This paper proposes a unified geometry-aware, frequency-domain framework for tilted slice localization and ischemic stroke segmentation that explicitly decouples pose estimation from lesion analysis. The method ...
Added: September 2, 2026
IEEE, 2026.
On behalf of the Organizing Committee, it is my great pleasure to extend a warm
welcome to all participants of the Fourth International IEEE Conference on
Distributed Computing and High-Performance Computing (DCHPC 2026), held
in Tehran from May 10–11, 2026. This conference is jointly organized by the
School of Computer Science at the Institute for Research in Fundamental
Sciences (IPM) ...
Added: September 2, 2026
Basalaev A., Rarovskii A., Journal of Singularities 2026 Vol. 30 P. 61–80
Saito theory associates to an isolated singularity rich structure that plays an important role in mirror symmetry. In this note we construct Saito theory for A and D type Landau-Ginzburg orbifolds. Namely, for the pairs (f,G), where f defines an isolated singularity of A and D type and G is a group of symmetries of ...
Added: September 1, 2026
Rybakov M., Shkatov D., Journal of Logic and Computation 2026 Vol. 36 No. 6 Article exag026
We prove Pi-1-1-hardness, and thus lack of recursive axiomatizability, of constant-domain modal predicate logics defined by a class of Dedekind complete linear Kripke frames containing a frame with an infinitely increasing chain of worlds. The result holds even for the language with one unary predicate letter, one propositional letter, and two individual variables. ...
Added: September 1, 2026
Guo Z., Jiang T., Wang G. et al., Journal of Computational and Applied Mathematics 2025 Vol. 463
The introduction of quaternions in the quantum chemistry framework provides new ideas for solving some of the difficulties encountered in traditional approaches and is expected to expand the scope of quantum chemistry research. This paper investigates the eigenvalue problem of a Hermitian quaternion matrix by means of the complex representation of a quaternion matrix. This ...
Added: December 16, 2024
Kirill V. Kaymakov, Dmitry S. Malyshev, Optimization Letters 2025 Vol. 19 P. 1441–1454
The tolerance of an element of a combinatorial optimization problem with respect to a given optimal solution is the maximum change, i.e., decrease or increase, of its cost, such that this solution remains optimal. The bottleneck path problem, for given an edge-capacitated graph, a source, and a target, is to find the max-min value of ...
Added: November 5, 2024
Kaimakov K., Malyshev D., Математические заметки 2024 Т. 116 № 4 С. 504–509
Для заданных $P=(p_1,\ldots,p_n)$ --- набора точек единичного квадрата и числа $1\leq k\leq \binom{n}{2}$ в данной работе рассматривается задача поиска $k$-ого порядкового расстояния между элементами $P$ в $l_s$-норме, где $s\in \{1,\infty\}$. Иными словами, рассматривается задача поиска такого минимального $d_k$, что выполнено $\sum\limits_{i<j}\indicator(\|p_i,p_j\|_{s} \leq d_k)\geq k$, где $\indicator$ --- индикаторная функция и $s\in \{1,\infty\}$. В настоящей работе ...
Added: May 31, 2024
Мещеряков М. В., Математика в высшем образовании 2022 № 20 С. 53–68
Статья содержит наглядное изложение элементов теории групп, порождённых отражениями в конечномерных евклидовых пространствах, основанное на естественнонаучном понятии калейдоскопа. Она предназначена преподавателям линейной алгебры и геометрии, дискретной математики, учителям специализированных физико-математических классов школ и студентам факультетов математики и информатики различных направлений подготовки, включая ряд физических и инженерных специальностей. Через рассмотрение калейдоскопов отмечаются взаимосвязи между несколькими различными ...
Added: October 12, 2023
Kruglov V., Pochinka O., Современная математика. Фундаментальные направления 2022 Т. 68 № 3 С. 467–487
Gradient-like flows on surfaces have simple dynamics, which inspired many mathematicians
to search for invariants of their topological equivalence. Under assumptions of different generality
on the class of gradient-like flows under consideration, such classical invariants as the Leontovich–
Mayer scheme, the Peixoto graph, the equipped Peixoto graph, the two-color Wang graph, the threecolor Oshemkov–Sharko graph, the Fleitas circular ...
Added: October 17, 2022
Miolane N., Caorsi M., Lupo U. et al., / Series CS "arxiv.org". 2021. No. 2108.09810.
This paper presents the computational challenge on differential geometry and topology that happened within the ICLR 2021 workshop "Geometric and Topological Representation Learning". The competition asked participants to provide creative contributions to the fields of computational geometry and topology through the open-source repositories Geomstats and Giotto-TDA. The challenge attracted 16 teams in its two month ...
Added: October 16, 2021
Razvenskaya O., Журнал Средневолжского математического общества 2020 Т. 22 № 4 С. 442–448
Классическая NP-трудная задача о взвешенной вершинной раскраске состоит в минимизации количества цветов в раскрасках вершин задаваемого графа так, что для каждой вершины назначаются цвета, количество которых равно задаваемому весу вершины, причем смежным вершинам назначаются различные цвета. Соответствующее наименьшее количество цветов называется взвешенным хроматическим числом графа. Известно несколько полиномиальных алгоритмических приемов для построения эффективных алгоритмов для ...
Added: December 16, 2020
Springer, 2020.
This book constitutes the proceedings of the 15th International Computer Science Symposium in Russia, CSR 2020, held in Yekaterinburg, Russia, in June 2020.
The 25 full papers and 6 invited papers were carefully reviewed and selected from 49 submissions. The papers cover a broad range of topics, such as: algorithms and data structures; computational complexity, including ...
Added: September 4, 2020
Galatenko A. V., Nersisyan S. A., Zhuk D., Mathematics 2019 Vol. 7 No. 8 P. 711
We consider the problem of finding a position of a d-dimensional box with given edge lengths that maximizes the number of enclosed points of the given finite set P⊂Rd , i.e., the problem of optimal box positioning. We prove that while this problem is polynomial for fixed values of d, it is NP-hard in the general case. The proof ...
Added: June 15, 2020
Galatenko A. V., Nersisyan S., Zhuk D., Mathematics 2019 Vol. 7 No. 8 P. 711
We consider the problem of finding a position of a d-dimensional box with given edge lengths that maximizes the number of enclosed points of the given finite set P⊂Rd , i.e., the problem of optimal box positioning. We prove that while this problem is polynomial for fixed values of d, it is NP-hard in the ...
Added: April 28, 2020
Springer, 2019.
Added: August 4, 2019