Higgins, Philip J.

1. The fundamental groupoid of the quotient of a Hausdorff space by a discontinuous action of a discrete group is the orbit groupoid of the induced action
   2002/12/19 by Ronald Brown, Philip J. Higgins, Brown, Ronald +1 · 1 citation
   Mathematics · #20F34 #20L13 #20L15 #Advanced Operator Algebra Research #Advanced Topology and Set Theory #Algebraic Topology (math.AT) #Category Theory (math.CT) #FOS: Mathematics #Homotopy and Cohomology in Algebraic Topology #math.AT #math.CT #msc:20F34 #msc:20L13 #msc:20L15
2. Cubical abelian groups with connections are equivalent to chain complexes
   2002/12/11 by Brown, R., Higgins, Philip J. · 1 citation
   #Algebraic Topology (math.AT) #Category Theory (math.CT) #FOS: Mathematics
3. Thin Elements and Commutative Shells in Cubical omega-categories
   2004/08/23 by Philip J. Higgins, Higgins, Philip J. · 1 citation
   Mathematics · #18D05 #18D35 #55U99 #Algebraic Topology (math.AT) #Algebraic structures and combinatorial models #Category Theory (math.CT) #FOS: Mathematics #Geometric and Algebraic Topology #Homotopy and Cohomology in Algebraic Topology #math.AT #math.CT #msc:18D05 #msc:18D35 #msc:55U99