
Journal of Lie Theory 26 (2016), No. 2, 535565 Copyright Heldermann Verlag 2016 Pseudogroups via Pseudoactions: Unifying Local, Global, and Infinitesimal Symmetry Anthony D. Blaom 10 Huruhi Road, Waiheke Island 1081, Auckland, New Zealand anthony.blaom@gmail.com A multiplicatively closed, horizontal foliation on a Lie groupoid may be viewed as a "pseudoaction" on the base manifold M. A pseudoaction generates a pseudogroup of transformations of M in the same way an ordinary Lie group action generates a transformation group. Infinitesimalizing a pseudoaction, one obtains the action of a Lie algebra on M, possibly twisted. A global converse to Lie's third theorem proven here states that every twisted Lie algebra action is integrated by a pseudoaction. When the twisted Lie algebra action is complete it integrates to a twisted Lie group action, according to a generalization of Palais' global integrability theorem. Keywords: Lie algebroid, pseudogroup, Cartan connection, Lie algebra, pseudoaction. MSC: 58H05; 58D19 [ Fulltextpdf (443 KB)] for subscribers only. 