Abstract
Let P n be the pure braid group of the 2-sphere, with n strings (n ≥ 3), and \( \hat P_n \) be its pro-ℓ completion (ℓ: a fixed prime number). We shall study what we call the special automorphism groups of P n and \( \hat P_n \), and apply it to Galois representations of the type proposed in Grothendieck [7].
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Dedicated to A. Grothendieck on his 60th birthday
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Ihara, Y. (2007). Automorphisms of Pure Sphere Braid Groups and Galois Representations. In: Cartier, P., Katz, N.M., Manin, Y.I., Illusie, L., Laumon, G., Ribet, K.A. (eds) The Grothendieck Festschrift. Modern Birkhäuser Classics. Birkhäuser, Boston, MA. https://doi.org/10.1007/978-0-8176-4575-5_8
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DOI: https://doi.org/10.1007/978-0-8176-4575-5_8
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