Zero sets of Lie algebras of analytic vector fields on real and complex 2-manifolds
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Zero sets of Lie algebras of analytic vector fields on real and complex 2-manifolds

Abstract

Let X be an analytic vector field on a real or complex 2-manifold, and K a compact set of zeros of X whose fixed point index is not zero. Let A denote the Lie algebra of analytic vector fields Y on M such that at every point of M the values of X and [X,Y] are linearly dependent. Then the vector fields in A have a common zero in K. Application: Let G be a connected Lie group having a 1-dimensional normal subgroup. Then every action of G on M has a fixed point.

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