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On the construction of normal wildly ramified extensions over Q p , (p ≠ 2)

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Abstract

Let p be an odd prime number, and let Q p be the field of rational p-adic numbers.The aim of this work is the determination of the standard form of an Eisenstein polynomial defining a normal wildly ramified extension of Q p . We prove first the equivalence between normality and cyclicity, give some essential normality conditions for the general case (degree p n), then we solve the problem completely for the case (degree p 2) also, we obtain that the normality depends on seven congruences modulo p m between the coefficients of the considered polynomial with just m = 2 or 3. Note that the case (degree p) was solved by Öystein Ore (see Math. Annalen 102 (1930), 283–304). Also examples are given.

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  1. P.O. Box 10507, Casa-Bandoeng, 20002, Casablanca, Morocco

    Akram Lbekkouri

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  1. Akram Lbekkouri
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Correspondence to Akram Lbekkouri.

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Lbekkouri, A. On the construction of normal wildly ramified extensions over Q p , (p ≠ 2). Arch. Math. 93, 331–344 (2009). https://doi.org/10.1007/s00013-009-0026-3

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  • DOI: https://doi.org/10.1007/s00013-009-0026-3

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