Zobrazeno 1 - 10
of 2 440
pro vyhledávání: '"Kochetkov, P. A."'
Autor:
Kochetkov, Yury
We consider the space $P$ of generic complex 5-degree polynomials. Critical values of such polynomial, i.e. four points in the complex plane, either are vertices of a convex quadrangle $Q$, or vertices of a triangle $T$ with one point inside $T$. The
Externí odkaz:
http://arxiv.org/abs/2405.10594
Autor:
Tsymbalov, I., Gorlova, D., Ivanov, K., Starodubtseva, E., Volkov, R., Tsygvintsev, I., Kochetkov, Yu., Korneev, Ph., Polonski, A., Savelev, A.
We propose a novel method for changing the length of laser wakefield electron acceleration in a gas jet by a cylindrical blast wave created by a perpendicularly focused nanosecond laser pulse. The shock front destroys the wake thus stopping interacti
Externí odkaz:
http://arxiv.org/abs/2403.19828
Autor:
Kochetkov, Yury
A cubic Galois polynomial is a cubic polynomial with rational coefficients that defines a cubic Galois field. Its discriminant is a full square and its roots $x_1,x_2,x_3$ (enumerated in some order) are real. There exists (and only one) quadratic pol
Externí odkaz:
http://arxiv.org/abs/2401.11208
Autor:
F. D. Kochetkov, R. E. Kalinin, I. A. Suchkov, A. O. Antonenko, O. V. Krymov, V. V. Khabibulin, M. I. Faber
Publikováno v:
Неотложная медицинская помощь, Vol 13, Iss 2, Pp 305-311 (2024)
The article describes a clinical case of recanalization of the superior mesenteric artery during acute mesenteric ischemia in an 81-year-old patient who was admitted to the emergency hospital in Ryazan with a clinic for “acute” abdomen. As a resu
Externí odkaz:
https://doaj.org/article/c9924a0a03c3472eb3adfb502645546a
Autor:
Elena I. Kasikhina, Ahmed Yasser Nada, Maria N. Ostretsova, Olga V. Zhukova, Mikhail A. Kochetkov, R. A Khanferyan
Publikováno v:
RUDN Journal of Medicine, Vol 28, Iss 3, Pp 382-389 (2024)
Relevance.Amonomorphic type of maculo-papular cutaneous mastocytosis was allocated relatively recently. Inchildren and adolescents with amonomorphic type of MPCM (adult type pattern), clinical manifestations persist into adulthood and can transform
Externí odkaz:
https://doaj.org/article/68cab439342448b6ae0df9a4edbbe933
Autor:
Kochetkov, Yury
In this purely experimental work we try to represent the set of plane maps with 3 vertices and 3 faces as a bipartite ribbon graph. In particular, this construction allows one to estimate the genus of the initial set.
Comment: 5 pages, 9 figures
Comment: 5 pages, 9 figures
Externí odkaz:
http://arxiv.org/abs/2308.15080
Autor:
Kochetkov, Yury, Osipov, Alexandr
For a two dimensional vector $\bar v=(\alpha,\beta)$, where $\alpha>0, \beta>0$ are irrational numbers independent over $\mathbb{Q}$, we consider the set $D_n=\{(i\alpha\,{\rm mod}\,1,i\beta\,{\rm mod}\,1),i=1,\ldots,n\}$ in a two dimensional torus a
Externí odkaz:
http://arxiv.org/abs/2308.01848
Autor:
Korneev, Ph., Bukharskii, N. D., Kochetkov, I. V., Ehret, M., Santos, J. J., Abe, Y., Law, K. F. F., Fujioka, S., Schaumann, G., Zielbauer, B.
Optical generation of energetic particle bunches requires high-power laser facilities operating in picosecond or femtosecond temporal domain. It is therefore preferable to use short laser pulses in all-optical platforms designed for guiding and focus
Externí odkaz:
http://arxiv.org/abs/2304.07816
Autor:
E. P. Kochetkov
Publikováno v:
Модернизация, инновация, развитие, Vol 15, Iss 2, Pp 298-314 (2024)
Purpose: is to identify the main directions of changing the theory of crisis management of companies under the influence of digitalization based on the analysis of technological transformations in the economy and institutional prerequisites.Methods:
Externí odkaz:
https://doaj.org/article/05e3d1c550ac4dc29da0f5b895200d5f
Online controlled experiments (A/B tests) have become the gold standard for learning the impact of new product features in technology companies. Randomization enables the inference of causality from an A/B test. The randomized assignment maps end use
Externí odkaz:
http://arxiv.org/abs/2212.08771