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Roots, iterations and logarithms of formal automorphisms

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Abstract

In this paper it is proved that having a logarithm is equivalent to having roots of arbitrary order in the group of automorphisms of a formal power series ring, and in algebraic subgroups too

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Authors and Affiliations

  1. Technische Hogeschool Eindhoven, Onderafdeling der Wiskunde en Informatica, Den Dolech 2, Postbus 513, NL-5600 MB, Eindhoven, The Netherlands

    C. Praagman

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  1. C. Praagman
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Praagman, C. Roots, iterations and logarithms of formal automorphisms. Aeq. Math. 33, 251–259 (1987). https://doi.org/10.1007/BF01836166

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  • DOI: https://doi.org/10.1007/BF01836166

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