Titlebook: Differential Geometry and Mathematical Physics; Lectures given at th M. Cahen,M. Wilde,L. Vanhecke Book 1983 D. Reidel Publishing Company,

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On the Classification of Manifolds Foliated by the Action of a Nilpotent Lie Group. The actions the orbits of which are the leaves of a foliation form a particularly interesting family of non transitive actions. In order to classify the corresponding manifolds, one is of course obliged to limit oneself to the case of foliations of codimension 1.

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0921-3767 erential Geometry held at Liege, May 2-3,1980 SIMULTANEOUS DEFORMATIONS OF A LIE ALGEBRA AND ITS MODULES D. Arnal University of Dijon INTRODUCTION We expose her978-90-277-1508-1978-94-009-7022-9Series ISSN 0921-3767 Series E-ISSN 2352-3905

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