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1. • CommentRowNumber1.
   • CommentAuthorzskoda
   • CommentTimeApr 8th 2013
   • PermaLink
   Author: zskoda
   Format: MarkdownItex[[Grothendieck-Teichmüller tower]] with redirect [[Grothendieck-Teichmüller group]].

   Grothendieck-Teichmüller tower with redirect Grothendieck-Teichmüller group.

2. • CommentRowNumber2.
   • CommentAuthorzskoda
   • CommentTimeApr 8th 2013
   • (edited Apr 8th 2013)
   • PermaLink
   Author: zskoda
   Format: MarkdownItexThe above entry is put in order to support the current discussion on [[quasi-Hopf algebra]]s. I just noticed that there is a major book in progress * Benoit Fresse, _Operads and Grothendieck-Teichmüller groups_, [hal-00656333](http://hal.archives-ouvertes.fr/hal-00656333), [pdf](http://hal.archives-ouvertes.fr/docs/00/65/63/33/PDF/OperadGT-January2012Preprint.pdf) - extract for a winter school, Jan 2012 (200 pages); _Homotopy of operads and GT groups_, December draft [pdf](http://math.univ-lille1.fr/~fresse/OperadHomotopyBook/OperadGT-December2012Preprint.pdf) 317 pp. > The ultimate objective of this book is to prove that the Grothendieck-Teichmüller group is the group of homotopy automorphisms of a rational completion of the little 2-discs operad.

   The above entry is put in order to support the current discussion on quasi-Hopf algebras. I just noticed that there is a major book in progress

   • Benoit Fresse, Operads and Grothendieck-Teichmüller groups, hal-00656333, pdf - extract for a winter school, Jan 2012 (200 pages); Homotopy of operads and GT groups, December draft pdf 317 pp.

   The ultimate objective of this book is to prove that the Grothendieck-Teichmüller group is the group of homotopy automorphisms of a rational completion of the little 2-discs operad.

3. • CommentRowNumber3.
   • CommentAuthorzskoda
   • CommentTimeDec 26th 2014
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   Author: zskoda
   Format: MarkdownItexI added a reference and a full definition of the Grothendieck-Teichmüller Lie algebra at [[Grothendieck-Teichmüller tower]]. Of course, at some point it should have its own entry but for now I think it is wiser to first collect some circle of facts and definition at the main entry.

   I added a reference and a full definition of the Grothendieck-Teichmüller Lie algebra at Grothendieck-Teichmüller tower. Of course, at some point it should have its own entry but for now I think it is wiser to first collect some circle of facts and definition at the main entry.