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David Goss
Digit permutations revisited
Journal de théorie des nombres de Bordeaux, 29 no. 3 (2017), p. 693-728, doi: 10.5802/jtnb.998
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Class. Math.: 11M38, 11G09
Keywords: $L$-series, Riemann hypothesis, digit permutations, measures, divided algebras

Résumé - Abstract

We discuss here characteristic $p$ $L$-series as well as the group $S_{(q)}$ which appears to act as symmetries of these functions. We explain various actions of $S_{(q)}$ that arise naturally in the theory as well as extensions of these actions. In general such extensions appear to be highly arbitrary but in the case where the zeroes are unramified, the extension is unique (and it is reasonable to expect it is unique only in this case). Having unramified zeroes is the best one could hope for in finite characteristic and appears to be an avatar of the Riemann hypothesis in this setting; see Section 8 for a more detailed discussion.

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