Minimal ample groupoids exist that are neither almost finite nor purely infinite, including amenable transformation groupoids and new essentially principal ones built from twisted topological groupoid constructions.
Twisted topological groupoids and their full groups
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Ample groupoids that are neither almost finite nor purely infinite
Minimal ample groupoids exist that are neither almost finite nor purely infinite, including amenable transformation groupoids and new essentially principal ones built from twisted topological groupoid constructions.