Título: Finite Coverings: a Journey Through Groups, Loops, Rings, and Semigroups.
Palestrante: Luise-Charlotte Kappe, Department of Mathematical Sciences, Binghamton University, USA.
Data: 27 de Fevereiro de 2019, 11 h.
Local: Sala 207, Bloco H, Campus Gragoatá, UFF.
Resumo: A group is said to be covered by a collection of proper subgroups if each element of the group belongs to at least one subgroup in the collection: the collection of subgroups is called a covering of the group. If the set of subgroups is finite, we say the group has a finite covering. Many questions raised in the context of finite coverings of groups, such as conditions for a group to have a finite covering by abelian subgroups or determining the minimal number of subgroups needed to cover the group, make sense in other algebraic structures too. In my talk, I will report on my journeys through groups, loops, rings, and semigroups, on what I discovered there about finite coverings together with several fellow travelers and on some discoveries which might still lie ahead.
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