Automatic continuity of homomorphisms and fixed points on metric compacta
Automatic continuity of homomorphisms and fixed points on metric compacta
复制标题
度量紧致上同态和不动点的自动连续性
DOI:
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发表时间:
2006
期刊:
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通讯作者:
S. Solecki
中科院分区:
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作者:
Christian Rosendal;S. Solecki
AbstractWe prove that arbitrary homomorphisms from one of the groups
$$Homeo(2^mathbb{N} ), Homeo(2^mathbb{N} )^mathbb{N} , Aut(mathbb{Q}, < ), Homeo(mathbb{R}) or Homeo(S^1 )$$
into a separable group are automatically continuous. This has consequences for the representations of these groups as discrete groups. For example, it follows, in combination with a result of V. G. Pestov, that any action of the discrete group Homeo+(ℝ) by homeomorphisms on a compact metric space has a fixed point.