The Karoubi envelope of a semigroup

Description:  The importance for Semigroup Theory of the Karoubi envelope of a semigroup became apparent in the 1980s with the Delay Theorem. This result fits in a framework that was since the 1960s one of the main driving forces of Semigroup Theory: the connections between semigroups and formal languages. In this talk we review some instances of this framework, highlighting a couple of applications of the Karoubi envelope of a semigroup.   Date:  2022-10-19 Start Time:   16:00 Speaker:  Alfredo Costa (CMUC, Univ. Coimbra) Institution:  CMUC, University of Coimbra Place:  Sala 2.5, DMUC See more:   <Main>   <UC|UP MATH PhD Program>