This research demonstrates 2-descent for algebraic stacks via finite Galois coverings, suggesting broader implications for algebraic geometry.
We prove that algebraic stacks satisfy 2 -descent for fppf coverings. We generalize Galois descent for schemes to stacks, by considering the case where the fppf covering is a finite Galois covering, and reformulating 2 -descent data in terms of Galois group actions on the stack.
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Olivier de Gaay Fortman (2026) studied this question.
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