English Algebraic stack Cited by user Duskgoo on 16 Oct 2023 In mathematics, an algebraic stack is a vast generalization of algebraic spaces, or schemes, which are foundational for studying moduli theory.
English Differentiable stack Cited by user Francesco Cattafi on 19 Feb 2022 A differentiable stack is the analogue in differential geometry of an algebraic stack in algebraic geometry.