Integrating Lie algebroids via stacks
classification
🧮 math.DG
math.AG
keywords
algebroidsgroupoidweinsteinalgebroideveryintegratedalwaysaxioms
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Lie algebroids can not always be integrated into Lie groupoids. We introduce a new object--``Weinstein groupoid'', which is a differentiable stack with groupoid-like axioms. With it, we have solved the integration problem of Lie algebroids. It turns out that every Weinstein groupoid has a Lie algebroid and every Lie algebroid can be integrated into a Weinstein groupoid.
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