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[?] Notes manuscrites d'auteur inconnu décrivant des groupes simples, infinis, de présentation finie (dûs à R. J. Thomson). L'un de ces groupes est G.
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Ghys, E., Sergiescu, V. Sur un groupe remarquable de difféomorphismes du cercle. Commentarii Mathematici Helvetici 62, 185–239 (1987). https://doi.org/10.1007/BF02564445
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DOI: https://doi.org/10.1007/BF02564445