Abstract
We discuss an analogue of the Kummer and Kummer-Artin-Schreier theories, twisting by a quadratic extension. The argument is developed not only over a field but also over a ring, as generally as possible.
Citation
Noriyuki Suwa. "Twisted Kummer and Kummer-Artin-Schreier theories." Tohoku Math. J. (2) 60 (2) 183 - 218, 2008. https://doi.org/10.2748/tmj/1215442871
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