Actions of Double Group-groupoids and Covering Morphism

Abstract

The purpose of the paper is to consider the covering morphism and the action of a double groupoid on a groupoid; and then characterize these notions for double group- groupoids. We also give a categorical equivalence between the actions and covering morphisms of double group-groupoids.                                                                                                                                                                                                                         

Keywords

• Group-groupoid
• Double groupoid
• Action
• Covering morphism

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