Zobrazeno 1 - 10
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pro vyhledávání: '"A. Kolmogorov"'
Autor:
N. Stupishin, V. Belov, A. Brul, V. Davydenko, P. Deichuli, A. Kolmogorov, V. Kolmogorov, V. Oreshonok, R. Vakhrushev, D. Osin
Publikováno v:
AIP Advances, Vol 14, Iss 6, Pp 065314-065314-6 (2024)
The advanced fast ion-dominated high beta plasma is achieved using multi-MW neutral heating beams. To facilitate the diagnostics of this fast ion-dominated plasma, a high-energy and high-current diagnostic neutral beam (DNB) injector was designed and
Externí odkaz:
https://doaj.org/article/1451c378c9f3424089b54a04959023d9
Autor:
Arkhipov, Pavel, Kolmogorov, Vladimir
The $k$-forest problem asks to find $k$ forests in a graph $G$ maximizing the number of edges in their union. We show how to solve this problem in $O(k^3 \min\{kn, m\} \log^2 n + k \cdot{\rm MAXFLOW}(m, m) \log n)$ time, breaking the $O_k(n^{3/2})$ c
Externí odkaz:
http://arxiv.org/abs/2409.20314
Autor:
Arkhipov, Pavel, Kolmogorov, Vladimir
We consider two problems for a directed graph $G$, which we show to be closely related. The first one is to find $k$ edge-disjoint forests in $G$ of maximal size such that the indegree of each vertex in these forests is at most $k$. We describe a min
Externí odkaz:
http://arxiv.org/abs/2409.14881
Autor:
Dvorak, Martin, Kolmogorov, Vladimir
Farkas established that a system of linear inequalities has a solution if and only if we cannot obtain a contradiction by taking a linear combination of the inequalities. We state and formally prove several Farkas-like theorems over linearly ordered
Externí odkaz:
http://arxiv.org/abs/2409.08119
Autor:
Mishra, Shashi B., Marcial, Edan T., Debata, Suryakanti, Kolmogorov, Aleksey N., Margine, Elena R.
Publikováno v:
Phys. Rev. B, 110, 174508 (2024)
A recent ab initio investigation of Na-C binary compounds under moderate pressures has uncovered a possible stable NaC$_4$ superconductor with an estimated critical temperature up to 41K. We revisit this promising binary system by performing a more f
Externí odkaz:
http://arxiv.org/abs/2407.16056
Autor:
Tomassetti, Charlsey R., Gochitashvili, Daviti, Renskers, Christopher, Margine, Elena R., Kolmogorov, Aleksey N.
We employ ab initio modeling to investigate the possibility of attaining high-temperature conventional superconductivity in ambient-pressure materials based on the known MgB$_2$C$_2$ and recently proposed thermodynamically stable NaBC ternary compoun
Externí odkaz:
http://arxiv.org/abs/2407.09347
This paper deals with the algorithmic aspects of solving feasibility problems of semidefinite programming (SDP), aka linear matrix inequalities (LMI). Since in some SDP instances all feasible solutions have irrational entries, numerical solvers that
Externí odkaz:
http://arxiv.org/abs/2405.13625
Autor:
Tomassetti, Charlsey R., Kafle, Gyanu P., Marcial, Edan T., Margine, Elena R., Kolmogorov, Aleksey N.
Delithiation of the known layered LiBC compound was predicted to induce conventional superconductivity at liquid nitrogen temperatures but extensive experimental work over the past two decades has detected no signs of the expected superconducting tra
Externí odkaz:
http://arxiv.org/abs/2403.00738
Autor:
Kolmogorov, Vladimir
Currently, the best known tradeoff between approximation ratio and complexity for the Sparsest Cut problem is achieved by the algorithm in [Sherman, FOCS 2009]: it computes $O(\sqrt{(\log n)/\varepsilon})$-approximation using $O(n^\varepsilon\log^{O(
Externí odkaz:
http://arxiv.org/abs/2307.00115
Publikováno v:
Phys. Chem. Chem. Phys., 2023, 25, 22415-22436
We present our findings of a large-scale screening for new synthesizable materials in five M-Sn binaries, M = Na, Ca, Cu, Pd, and Ag. The focus on these systems was motivated by the known richness of M-Sn properties with potential applications in ene
Externí odkaz:
http://arxiv.org/abs/2306.10223