The paper is devoted to ramification theory for a class of complete discrete valuation fields, which includes 2-dimensional local fields of prime characteristic p. It is proved that any finite extension of such a field can be modified into an extension with zero ramification depth by means of an infinite elementary Abelian base change.
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I. B. Zhukov, “Ramification in elementary Abelian extensions,” Zap. Nauchn. Semin. POMI, 413, 106–114 (2013).
L. Xiao and I. Zhukov, “Ramification in the imperfect residue field case, approaches and questions,” St.Petersb. Math. J., 26, No. 5 (2015).
E. F. Lysenko, “Ramification in a cyclic extension of degree p 2 of a complete discrete valuation field of prime characteristic p with imperfect residue field,” Zap. Nauchn. Semin. POMI, 413, 153–172 (2013).
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Translated from Zapiski Nauchnykh Seminarov POMI, Vol. 423, 2014, pp. 126–131.
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Zhukov, I.B. The Elementary Abelian Conductor. J Math Sci 209, 564–567 (2015). https://doi.org/10.1007/s10958-015-2513-3
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DOI: https://doi.org/10.1007/s10958-015-2513-3