C. Phung

collaborators

2 papers

math.CT2013

Braided equivariant crossed modules and cohomology of $Γ$ -modules

Nguyen Tien Quang, Che Thi Kim Phung, Pham Thi Cuc

If $Γ$ is a group, then braided $Γ$ -crossed modules are classified by braided strict $Γ$ -graded categorial groups. The Schreier theory obtained for $Γ$ -module extensions of the typ…

math.GR2013

The prolongation of central extensions

Nguyen Tien Quang, Che T. Kim Phung, Pham Thi Cuc

The aim of this paper is to study the $(α, γ)$ -prolongation of central extensions. We obtain the obstruction theory for $(α, γ)$ -prolongations and classify $(α, γ)$ -prolongations t…

Braided equivariant crossed modules and cohomology of Γ-modules

The prolongation of central extensions

Braided equivariant crossed modules and cohomology of $Γ$ -modules