Zobrazeno 1 - 10
of 108
pro vyhledávání: '"Jonathan, Ariel"'
Autor:
Barmak, Jonathan Ariel
By a result of Babai, with finitely many exceptions, every group $G$ admits a semi-regular poset representation with three orbits, that is, a poset $P$ with automorphism group $\textrm{Aut}(P) \simeq G$ such that the action of $\textrm{Aut}(P)$ on th
Externí odkaz:
http://arxiv.org/abs/2307.03106
For each $n\ge 1$ we determine the minimum number of points in a poset with cyclic automorphism group of order $n$.
Comment: 12 pages, 5 figures
Comment: 12 pages, 5 figures
Externí odkaz:
http://arxiv.org/abs/2301.08701
Autor:
Barmak, Jonathan Ariel
We study the free metabelian group $M(2,n)$ of prime power exponent $n$ on two generators by means of invariants $M(2,n)'\to \mathbb{Z}_n$ that we construct from colorings of the squares in the integer grid $\mathbb{R} \times \mathbb{Z} \cup \mathbb{
Externí odkaz:
http://arxiv.org/abs/2003.04392
Autor:
Jonathan Ariel López-Cuevas, Mireya Martínez-García, Enrique Hernández-Lemus, Guillermo de Anda-Jáuregui
Publikováno v:
Frontiers in Public Health, Vol 11 (2023)
IntroductionThe COVID-19 pandemic, especially its early stages, sparked extensive discussions regarding the potential impact of metabolic and cardiovascular comorbidities on the severity and fatality of SARS-CoV-2 infection, yielding inconclusive out
Externí odkaz:
https://doaj.org/article/3756af3ca6f04a3da599392cde1059c5
Autor:
Barmak, Jonathan Ariel
Every element $w$ in the commutator subgroup of the free group $\mathbb{F}_2$ of rank 2 determines a closed curve in the grid $\mathbb{Z} \times \mathbb{R} \cup \mathbb{R} \times \mathbb{Z} \subseteq \mathbb{R}^2$. The winding numbers of this curve a
Externí odkaz:
http://arxiv.org/abs/1904.10072
We prove a version of the Lefschetz fixed point theorem for multivalued maps $F:X\multimap X$ in which $X$ is a finite $T_0$ space.
Comment: 21 pages
Comment: 21 pages
Externí odkaz:
http://arxiv.org/abs/1808.08985
Autor:
Barmak, Jonathan Ariel
We prove that the presentations $\langle x,y | [x,y],1 \rangle$ and $\langle x,y | [x,[x,y^{-1}]]^2y[y^{-1},x]y^{-1},[x,[[y^{-1},x],x]] \rangle$ are not $Q^*$-equivalent even though their standard complexes have the same simple homotopy type.
Co
Co
Externí odkaz:
http://arxiv.org/abs/1806.11493
Autor:
Barmak, Jonathan Ariel
Publikováno v:
Proceedings of the Edinburgh Mathematical Society 62 (2019) 553-558
It is well known that if $X$ is a CW-complex, then for every weak homotopy equivalence $f:A\to B$, the map $f_*:[X,A]\to [X,B]$ induced in homotopy classes is a bijection. For which spaces $X$ is $f^*:[B,X]\to [A,X]$ a bijection for every weak equiva
Externí odkaz:
http://arxiv.org/abs/1709.08734
Autor:
Barmak, Jonathan Ariel
A lion and a man move continuously in a space $X$. The aim of the lion is to capture his prey while the man wants to escape forever. Which of them has a strategy? This question has been studied for different metric domains. In this article we conside
Externí odkaz:
http://arxiv.org/abs/1703.01480
We present a new test for studying asphericity and diagrammatic reducibility of group presentations. Our test can be applied to prove diagrammatic reducibility in cases where the classical weight test fails. We use this criterion to generalize result
Externí odkaz:
http://arxiv.org/abs/1601.00604