Abstract
In the present work we give the construction of the genus field and the extended genus field of an elementary abelian l-extension of a field of rational functions, where l is a prime number. In the Kummer case, if K is contained in a cyclotomic function field, the construction is given using Leopoldt’s ideas by means of Dirichlet characters. Following the definition of Anglès and Jaulent of extended Hilbert class field, we obtain the extended genus field of an elementary abelian l-extension of a field of rational functions.
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