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Fixed points of local actions of nilpotent Lie groups on surfaces
Published online by Cambridge University Press: 28 January 2016
Abstract
Let $G$ be a connected nilpotent Lie group with a continuous local action on a real surface
$M$, which might be non-compact or have non-empty boundary
$\unicode[STIX]{x2202}M$. The action need not be smooth. Let
$\unicode[STIX]{x1D711}$ be the local flow on
$M$ induced by the action of some one-parameter subgroup. Assume
$K$ is a compact set of fixed points of
$\unicode[STIX]{x1D711}$ and
$U$ is a neighborhood of
$K$ containing no other fixed points.
Theorem.If the Dold fixed-point index of$\unicode[STIX]{x1D711}_{t}|U$is non-zero for sufficiently small
$t>0$, then
$\mathsf{Fix}(G)\cap K\neq \varnothing$.
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- Research Article
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- Copyright
- © Cambridge University Press, 2016
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