24 citations · 25 across the 8 of their papers we have counts for
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math.AG2015
The Lusternik-Schnirelmann category for a differentiable stack
Samirah Alsulami, Hellen Colman, Frank Neumann
We introduce the notion of Lusternik-Schnirelmann category for differentiable stacks and establish its relation with the groupoid Lusternik-Schnirelmann category for Lie groupoids.
math.AT2015
Free and based path groupoids
Andres Angel, Hellen Colman
We give an explicit description of the free path and loop groupoids in the Morita bicategory of translation topological groupoids. We prove that the free path groupoid of a discret…