Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Borovik, P. V."'
Autor:
Borovik A. V., Zhdanov A. A.
Publikováno v:
Solar-Terrestrial Physics, Vol 9, Iss 4, Pp 37-45 (2023)
We have examined the dynamics of the longitudinal magnetic field of active region NOAA 12673, using data from the Solar Dynamics Observatory (SDO). During the passage of the active region (AR) across the solar disk, its spots and background fields sh
Externí odkaz:
https://doaj.org/article/25f9f37bbaa845aa9a11c63b0d752021
This paper is an introduction to our ongoing more comprehensive work on a critically important period in the history of Russian mathematics education; it provides a glimpse into the socio-political environment in which the famous Soviet tradition of
Externí odkaz:
http://arxiv.org/abs/2105.10979
Autor:
Borovik, Alexandre V.
The growing disconnection of the majority of population from mathematics is becoming a phenomenon that is increasingly difficult to ignore. This paper attempts to point to deeper roots of this cultural and social phenomenon. It concentrates on mathem
Externí odkaz:
http://arxiv.org/abs/1407.1954
The well known Andrews-Curtis Conjecture [2] is still open. In this paper, we establish its finite version by describing precisely the connected components of the Andrews-Curtis graphs of finite groups. This finite version has independent importance
Externí odkaz:
http://arxiv.org/abs/1103.1295
We discuss the time complexity of the word and conjugacy search problems for free products $G = A \star_C B$ of groups $A$ and $B$ with amalgamation over a subgroup $C$. We stratify the set of elements of $G$ with respect to the complexity of the wor
Externí odkaz:
http://arxiv.org/abs/0903.3751
We discuss time complexity of The Conjugacy Problem in HNN-extensions of groups, in particular, in Miller's groups. We show that for "almost all", in some explicit sense, elements, the Conjugacy Problem is decidable in cubic time. It is worth noting
Externí odkaz:
http://arxiv.org/abs/0903.3754
We introduce the concept of orientation for Lagrangian matroids represented in the flag variety of maximal isotropic subspaces of dimension N in the real vector space of dimension 2N+1. The paper continues the study started in math.CO/0209100.
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Externí odkaz:
http://arxiv.org/abs/math/0209217
Represented Coxeter matroids of types $C_n$ and $D_n$, that is, symplectic and orthogonal matroids arising from totally isotropic subspaces of symplectic or (even-dimensional) orthogonal spaces, may also be represented in buildings of type $C_n$ and
Externí odkaz:
http://arxiv.org/abs/math/0209100
We are now witnessing a rapid growth of a new part of group theory which has become known as "statistical group theory". A typical result in this area would say something like ``a random element (or a tuple of elements) of a group G has a property P
Externí odkaz:
http://arxiv.org/abs/math/0204078
We introduce a family of atomic measures on free groups generated by no-return random walks. These measures are shown to be very convenient for comparing "relative sizes" of subgroups, context-free and regular subsets (that, subsets generated by fini
Externí odkaz:
http://arxiv.org/abs/math/0204070