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Algebra Logika, 2010 Volume 49, Number 6, Pages 757–765 (Mi al465)

Toward a theorem of Douady

Yu. L. Ershovab

a Sobolev Institute of Mathematics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
b Novosibirsk State University, Novosibirsk, Russia

Abstract: A theorem of Douady says that the absolute Galois group of a rational function field $F(x)$ in one variable over an algebraically closed field $F$ of characteristic 0 is a free profinite group. A new method is proposed to extend Douady's theorem from the case of the complex number field $F=\mathbb C$ to the case of an arbitrary field.

Keywords: absolute Galois group, profinite group, field.

UDC: 512.623.4

Received: 10.11.2010


 English version:
Algebra and Logic, 2010, 49:6, 509–514

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© Steklov Math. Inst. of RAS, 2025