Autor(es): Montoli, Andrea ; Rodelo, Diana ; Van der Linden, Tim
Data: 2014
Identificador Persistente: https://hdl.handle.net/10316/43871
Origem: Estudo Geral - Universidade de Coimbra
Autor(es): Montoli, Andrea ; Rodelo, Diana ; Van der Linden, Tim
Data: 2014
Identificador Persistente: https://hdl.handle.net/10316/43871
Origem: Estudo Geral - Universidade de Coimbra
We show that the adjunction between monoids and groups obtained via the Grothendieck group construction is admissible, relatively to surjective homomorphisms, in the sense of categorical Galois theory. The central extensions with respect to this Galois structure turn out to be the so-called special homogeneous surjections.