Zobrazeno 1 - 10
of 927
pro vyhledávání: '"A. A. Zelenko"'
Publikováno v:
Наука и техника, Vol 0, Iss 6, Pp 71-76 (2007)
A model for diesel operational process has been developed and this model takes into account composition and physical and chemical properties of mixed fuels. Operational processes of 4ЧН 11/12.5 have been analyzed and this analysis makes it possible
Externí odkaz:
https://doaj.org/article/e944a555522b4cf69db208363789d7d6
Entropic Value-at-Risk (EVaR) measure is a convenient coherent risk measure. Due to certain difficulties in finding its analytical representation, it was previously calculated explicitly only for the normal distribution. We succeeded to overcome thes
Externí odkaz:
http://arxiv.org/abs/2403.01468
Autor:
Lin, Zaifeng, Zelenko, Igor
The classical result of Eisenhart states that if a Riemannian metric $g$ admits a Riemannian metric that is not constantly proportional to $g$ and has the same (parameterized) geodesics as $g$ in a neighborhood of a given point, then $g$ is a direct
Externí odkaz:
http://arxiv.org/abs/2308.14218
Autor:
Berkolaiko, Gregory, Zelenko, Igor
Publikováno v:
Invent. Math. (2024)
In many applied problems one seeks to identify and count the critical points of a particular eigenvalue of a smooth parametric family of self-adjoint matrices, with the parameter space often being known and simple, such as a torus. Among particular s
Externí odkaz:
http://arxiv.org/abs/2304.04331
Publikováno v:
Modern Stochastics: Theory and Applications, Vol 11, Iss 4, Pp 373-394 (2024)
Entropic Value-at-Risk (EVaR) measure is a convenient coherent risk measure. Due to certain difficulties in finding its analytical representation, it was previously calculated explicitly only for the normal distribution. We succeeded to overcome thes
Externí odkaz:
https://doaj.org/article/6aa30f69e430496a89a7d115caed699b
Autor:
Sykes, David, Zelenko, Igor
We prove that for every $n\geq 3$ the sharp upper bound for the dimension of the symmetry groups of homogeneous, 2-nondegenerate, $(2n+1)$-dimensional CR manifolds of hypersurface type with a $1$-dimensional Levi kernel is equal to $n^2+7$, and simul
Externí odkaz:
http://arxiv.org/abs/2102.08599
Autor:
Sykes, David, Zelenko, Igor
We construct canonical absolute parallelisms over real-analytic manifolds equipped with $2$-nondegenerate, hypersurface-type CR structures of arbitrary odd dimension not less than $7$ whose Levi kernel has constant rank belonging to a broad subclass
Externí odkaz:
http://arxiv.org/abs/2010.02770
A typical linear projection of the Grassmannian in its Plucker embedding is injective, unless its image is a projective space. A notable exception are self-adjoint linear projections, which have even degree. We consider linear projections of Gr_3(C^6
Externí odkaz:
http://arxiv.org/abs/2004.10070
Autor:
Doubrov, Boris, Zelenko, Igor
We construct a sequence of rank 3 distributions on $n$-dimensional manifolds for any $n\geq 7$ such that the dimension of their symmetry group grows exponentially in $n$ (more precisely it is equal to $\operatorname{Fib}_{n-1}+n+2$, where $\operatorn
Externí odkaz:
http://arxiv.org/abs/2004.07201
H. Weyl in 1921 demonstrated that for a connected manifold of dimension greater than $1$, if two Riemannian metrics are conformal and have the same geodesics up to a reparametrization, then one metric is a constant scaling of the other one. In the pr
Externí odkaz:
http://arxiv.org/abs/2001.08584