O. Broche

collaborators

2 papers

math.RA2008

Antisymmetric Elements in Group Rings II

O. Broche, E. Jespers, C. Polcino Milies +1

Let $R$ be a commutative ring, $G$ a group and $R G$ its group ring. Let $\vp : RG\to RG$ denote the $R$ -linear extension of an involution $\vp$ defined on $G$ . An element $x$ in $R…

math.KT2007

Antisymmetric elements in group rings with an orientation morphism

O. Broche, E. Jespers, M. Ruiz

Let $R$ be a commutative ring, $G$ a group and $R G$ its group ring. Let $ϕ_{σ} : R G \to R G$ denote the involution defined by $ϕ_{σ} (\sum r_{g} g) = \sum r_{g} σ (g) g^{- 1}$ , where $σ:G\t…