Results 1 to 10 of about 9,681,419 (157)

Free Boolean Topological Groups [PDF]

open access: yesAxioms, 2015
Known and new results on free Boolean topological groups are collected. An account of the properties that these groups share with free or free Abelian topological groups and properties specific to free Boolean groups is given.
Ol’ga Sipacheva
doaj   +4 more sources

The Unipotency of Linear Groups Generated by Matrices with No More than Five Jorden Blocks

open access: yesJournal of Harbin University of Science and Technology, 2022
Aiming at the question whether the group generated by two unipotent matrices whose Jordan blocks are of order no more than five is a unipotent group, based on the fundamental definition of nilpotent matrix, we use the matrix logarithm tool to obtain some
YANG Xin-song, LI Jia-xin
doaj   +1 more source

Free groups defined by finite $p$-automata

open access: yesResearches in Mathematics, 2023
For every odd prime $p$ we construct two $p$-automata with 14 inner states and prove that the group generated by 2 automaton permutations defined at their states is a free group of rank 2.
A.P. Krenevych, A.S. Oliynyk
doaj   +1 more source

Torsion Free Groups [PDF]

open access: yesTransactions of the American Mathematical Society, 1986
In this paper we introduce the class of torsion free k k -groups and the notion of a knice subgroup. Torsion free k k -groups form a class of groups more extensive than the separable groups of Baer, but they enjoy many of the same closure properties.
Hill, Paul, Megibben, Charles
openaire   +2 more sources

Free quasitopological groups

open access: yesTopology and its Applications, 2023
17 pages, 2 ...
Jeremy Brazas, Sarah Emery
openaire   +3 more sources

The Unipotency of the Free Group with Linear Representation of Dimension 11

open access: yesJournal of Harbin University of Science and Technology, 2022
For the unipotent problem of binary-generated free groups, the new trace equations are obtained by intensive study of combinatorial properties of the primitive element of the binary-generated free groups.
YANG Xin-song, XIA Xiao-dan
doaj   +1 more source

Non-∀-homogeneity in free groups

open access: yesBulletin of Mathematical Sciences, 2021
We prove that non-abelian free groups of finite rank at least 3 or of countable rank are not ∀-homogeneous. We answer three open questions from Kharlampovich, Myasnikov, and Sklinos regarding whether free groups, finitely generated elementary free groups,
Olga Kharlampovich, Christopher Natoli
doaj   +1 more source

The Number of Sides of a Parallelogram [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 1999
We define parallelograms of base a and b in a group. They appear as minimal relators in a presentation of a subgroup with generators a and b. In a Lie group they are realized as closed polygonal lines, with sides being orbits of left-invariant vector ...
Elisha Falbel, Pierre-Vincent Koseleff
doaj   +1 more source

Risk Factors for Fungal Co-Infections in Critically Ill COVID-19 Patients, with a Focus on Immunosuppressants

open access: yesJournal of Fungi, 2021
Severe cases of coronavirus disease 2019 (COVID-19) managed in the intensive care unit are prone to complications, including secondary infections with opportunistic fungal pathogens.
Obinna T. Ezeokoli   +2 more
doaj   +1 more source

Measuring cones and other thick subsets in free groups [PDF]

open access: yesInternational Journal of Group Theory, 2018
In this paper we investigate the special automata over finite rank free groups and estimate asymptotic characteristics of sets they accept‎. ‎We show how one can decompose an arbitrary regular subset of a finite rank free group into disjoint union of ...
Elizaveta Frenkel   +1 more
doaj   +1 more source

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