Zobrazeno 1 - 10
of 1 321
pro vyhledávání: '"Tymoshenko, A. A."'
Autor:
Andriushin, N. D., Grumbach, J., Kulbakov, A. A., Tymoshenko, Y. V., Onykiienko, Y. A., Firouzmandi, R., Cheng, E., Granovsky, S., Skourski, Y., Ollivier, J., Walker, H. C., Kocsis, V., Buchner, B., Keimer, B., Doerr, M., Inosov, D. S., Peets, D. C.
Centrosymmetric compounds which host three-dimensional topological spin structures comprise a distinct subclass of materials in which multiple-$\mathbf{q}$ magnetic order is stabilized by anisotropy and bond frustration in contrast to the more common
Externí odkaz:
http://arxiv.org/abs/2409.10214
We study a linear filtering problem where the signal and observation processes are described as solutions of linear stochastic differential equations driven by time-space Brownian sheets. We derive a stochastic integral equation for the conditional v
Externí odkaz:
http://arxiv.org/abs/2407.06386
The transmission of monkeypox is studied using a stochastic model taking into account the biological aspects, the contact mechanisms and the demographic factors together with the intrinsic uncertainties. Our results provide insight into the interacti
Externí odkaz:
http://arxiv.org/abs/2407.05486
Autor:
Andriushin, N. D., Muller, J., Pavlovskii, N. S., Grumbach, J., Granovsky, S., Tymoshenko, Y. V., Zaharko, O., Ivanov, A., Ollivier, J., Doerr, M., Keimer, B., Mostovoy, M., Inosov, D. S., Peets, D. C.
Spin-nematic and spin-smectic phases have been reported in magnetic materials, which break rotational symmetry while preserving translational symmetry along certain directions. However, until now the analogy to liquid crystals remained incomplete bec
Externí odkaz:
http://arxiv.org/abs/2405.12889
In this paper, we consider a McKean-Vlasov (mean-field) stochastic partial differential equations (SPDEs) driven by a Brownian sheet. We study the propagation of chaos for a space-time Ornstein-Uhlenbeck SPDE type. Subsequently, we prove the existenc
Externí odkaz:
http://arxiv.org/abs/2404.19490
Using key tools such as It\^o formula for general semi-martingales, moments estimates for L\'{e}vy-type stochastic integrals and properties of regular varying functions we find conditions under which solutions of stochastic differential equation with
Externí odkaz:
http://arxiv.org/abs/2402.05594
Autor:
N. D. Andriushin, J. Muller, N. S. Pavlovskii, J. Grumbach, S. Granovsky, Y. V. Tymoshenko, O. Zaharko, A. Ivanov, J. Ollivier, M. Doerr, B. Keimer, M. Mostovoy, D. S. Inosov, D. C. Peets
Publikováno v:
npj Quantum Materials, Vol 9, Iss 1, Pp 1-6 (2024)
Abstract Topologically nontrivial magnetic structures such as skyrmion lattices are well known in materials lacking lattice inversion symmetry, where antisymmetric exchange interactions are allowed. Only recently, topological multi-q magnetic texture
Externí odkaz:
https://doaj.org/article/e3faf66f8a7e46269886030c76a8be15
Autor:
Andriushin, Nikita D., Grumbach, Justus, Kim, Jung-Hwa, Reehuis, Manfred, Tymoshenko, Yuliia V., Onykiienko, Yevhen A., Jain, Anil, MacFarlane, W. Andrew, Maljuk, Andrey, Granovsky, Sergey, Hoser, Andreas, Pomjakushin, Vladimir, Ollivier, Jacques, Doerr, Mathias, Keimer, Bernhard, Inosov, Dmytro S., Peets, Darren C.
Publikováno v:
Phys. Rev. B 108, 174420 (2023)
The cubic perovskite SrFeO$_3$ was recently reported to host hedgehog- and skyrmion-lattice phases in a highly symmetric crystal structure which does not support the Dzyaloshinskii-Moriya interactions commonly invoked to explain such magnetic order.
Externí odkaz:
http://arxiv.org/abs/2309.15594
In this paper we study a Pontryagin type stochastic maximum principle for the optimal control of a system, where the state dynamics satisfy a stochastic partial differential equation (SPDE) driven by a two-parameter (time-space) Brownian motion (also
Externí odkaz:
http://arxiv.org/abs/2308.00173
Autor:
O. S. Bondarenko, O. O. Tymoshenko
Publikováno v:
Право і безпека, Vol 93, Iss 2, Pp 127-139 (2024)
The article is devoted to the analysis of problems and possibilities of counteracting corruption in the conditions of martial law. The beginning of the full-scale invasion of russia led not only to significant financial problems in Ukraine, but also
Externí odkaz:
https://doaj.org/article/6f263a47e487473485fc873a7ac781ee