Abstract
Any étale Lie groupoid G is completely determined by its associated convolution algebra C c ∞( G) equipped with the natural Hopfalgebroid structure. We extend this result to the generalized morphisms between étale Lie groupoids: we show that any principal H-bundle P over G is uniquely determined by the associated C c ∞( G)- C c ∞( H)-bimodule C c ∞( P) equipped with the natural coalgebra structure. Furthermore, we prove that the functor C c ∞gives an equivalence between the Morita category of étale Lie groupoids and the Morita category of locally grouplike Hopf algebroids.
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