Conformally natural extension of homeomorphisms of the circle
Conformally natural extension of homeomorphisms of the circle
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DOI:
10.1007/bf02392590
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发表时间:
1986-12
期刊:
影响因子:
3.7
通讯作者:
A. Douady;C. Earle
中科院分区:
文献类型:
--
作者:
A. Douady;C. Earle
24 A. DOUADY AND CJ EARLE write g'instead of gz if g is holomorphic.) The group Gx G operates on the space qr of continuous maps of/) into itself, or on c~(S1), by (g, h). cp= gocpoh-1. If G operates on X and Y, a map T: X--> Y is called G-equiyariant, or conformally natural, if T (ga)= gT (a) holds for gEG and aEX. If GxG operates on X and Y, we say that T: X--> Y is conformally natural if it is Gx G-equivariant.Example. There is a unique conformally natural map from D to~($1). It is the map z~--> rlz, where r/z is the harmonic measure of z: tlz (A) 2x JA Iz-~[2 if A= S 1 is a Borel set.