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Journal Articles Journal of Number Theory Year : 2016

Tame Class Field Theory for Global Function Fields


We give a function field specific, algebraic proof of the main results of class field theory for abelian extensions of degree coprime to the characteristic. By adapting some methods known for number fields and combining them in a new way, we obtain a different and much simplified proof, which builds directly on a standard basic knowledge of the theory of function fields. Our methods are explicit and constructive and thus relevant for algorithmic applications. We use generalized forms of the Tate–Lichtenbaum and Ate pairings, which are well-known in cryptography, as an important tool.
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Dates and versions

hal-01097382 , version 1 (19-12-2014)
hal-01097382 , version 2 (26-12-2015)



Florian Hess, Maike Massierer. Tame Class Field Theory for Global Function Fields. Journal of Number Theory, 2016, 162, pp.86--115. ⟨10.1016/j.jnt.2015.10.004⟩. ⟨hal-01097382v2⟩


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