Corpus ID: 119666830

The Betti side of the double shuffle theory. III. Bitorsor structures

@article{Enriquez2019TheBS,
  title={The Betti side of the double shuffle theory. III. Bitorsor structures},
  author={B. Enriquez and H. Furusho},
  journal={arXiv: Algebraic Geometry},
  year={2019}
}
In the two first parts of the series, we constructed stabilizer subtorsors of a `twisted Magnus' torsor, studied their relations with the associator and double shuffle torsors, and explained their `de Rham' nature. In this paper, we make the associated bitorsor structures explicit and explain the `Betti' nature of the corresponding right torsors; we thereby complete one aim of the series. We study the discrete and pro-p versions of the `Betti' group of the double shuffle bitorsor. 
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