Zobrazeno 1 - 10 of 16 pro vyhledávání: '"Sergey Davidov"'
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Akademický článek
Research of the dynamics of wholesale segment concentration level in the regional pharmaceutical market
Autor: Andrey Goryachev, Leila Urusova, Taisiya Kabakova, Sergey Rusanov, Natalya Kuvshinova, Oleg Afanasiev, Elena Lemeshchenko, Sergey Davidov
Publikováno v: Pharmacia, Vol 71, Iss , Pp 1-8 (2024)
Introduction: The study of the competitive environment in the pharmaceutical market is an element of the analysis of the drug supply system. The purpose of the study is to analyze the dynamics of concentration levels in the wholesale segment of the r
Externí odkaz: https://doaj.org/article/5845f8681a6845239f4428941f7b1817
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2
Hyperidentities with permutations in invertible binary algebras
Autor: Davit Shahnazaryan, Sergey Davidov
Publikováno v: Armenian Journal of Mathematics, Vol 12, Iss 12 (2020)
In this paper, using hyperidentities with permutations we obtained characterization invertible algebras of various types of linearity.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d0a90fb04ac67ba9231653c5e0d1e17
http://armjmath.sci.am/index.php/ajm/article/view/443
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3
On the Structure of Medial Divisible n-Ary Groupoids
Autor: Sergey Davidov
Publikováno v: Mathematical Notes. 104:29-38
It is proved that a finitely generated medial divisible n-ary groupoid is a medial n-ary quasigroup, and each medial divisible n-ary groupoid is a homomorphic image of a medial n-ary quasigroup.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::43d8e5d2c5dbb751d747658e9b616a4e
https://doi.org/10.1134/s0001434618070040
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6
Invertible binary algebras principally isotopic to a group
Autor: Senik Alvrtsyan, Davit Shahnazaryan, Sergey Davidov
Publikováno v: Asian-European Journal of Mathematics. 13:2050118
In this paper, using the second-order formulas, we obtained characterizations of invertible algebras principally isotopic to a group or an abelian group.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::250f7b4a29e647693c74f8916b52c47a
https://doi.org/10.1142/s1793557120501181
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7
On Invertible T-Algebras
Autor: Sergey Davidov
Publikováno v: Journal of Mathematical Sciences. 193:394-400
In this paper, we characterize the subclass of the invertible T-algebras by a second-order formula.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5209c45241bfef9f27aa2a85fcaf2e6e
https://doi.org/10.1007/s10958-013-1467-6
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8
On the invertible algebras linear over an Abelian group
Autor: Sergey Davidov
Publikováno v: Journal of Contemporary Mathematical Analysis. 48:158-165
In this paper using the second order formula, namely the ∀∃(∀)-identities, we characterize some subclasses of the invertible algebras that are linear over an Abelian group and have restrictions on the use of the automorphisms of the correspondi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5a791a6d0faa05937a428ea3d9e81116
https://doi.org/10.3103/s1068362313040031
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10
An Embedding Theorem for Medial $\bf n$-ary Groupoid with Cancellation
Autor: Sergey Davidov
Publikováno v: Armenian Journal of Mathematics, Vol 7, Iss 2 (2015)
In 1949 M.~Sholander proved that every medial cancellation groupoid can be embedded into a medial quasigroup. In this paper we prove that it is also true for $n$-ary cancellation groupoids, namely, every medial cancellation $n$-ary groupoid can be em
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::4ab42dae075c4d82209370075d0d031a
http://armjmath.sci.am/index.php/ajm/article/view/119
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