MathSciNet bibliographic data MR1305402 14E20 (11R32 20F34) Ihara, Yasutaka On the embedding of ${\rm Gal}(\overline{\bf Q}/{\bf Q})$${\rm Gal}(\overline{\bf Q}/{\bf Q})$ into $\widehat{\rm GT}$$\widehat{\rm GT}$. With an appendix: the action of the absolute Galois group on the moduli space of spheres with four marked points by Michel Emsalem and Pierre Lochak. London Math. Soc. Lecture Note Ser., 200, The Grothendieck theory of dessins d'enfants (Luminy, 1993), 289–321, Cambridge Univ. Press, Cambridge, 1994. Links to the journal or article are not yet available

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