The paper introduces weaker axioms for bicategories of fractions that permit smaller classes of invertible arrows, yielding small hom-categories and canonical representatives for 2-cells, and sketches how this applies to orbispaces.
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Bicategories of fractions revisited: towards small homs and canonical 2-cells
The paper introduces weaker axioms for bicategories of fractions that permit smaller classes of invertible arrows, yielding small hom-categories and canonical representatives for 2-cells, and sketches how this applies to orbispaces.