TWISTED KUMMER AND KUMMER-ARTIN-SCHREIER THEORIES
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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.
- Tohoku Mathematical Journal, Second Series
Tohoku Mathematical Journal, Second Series 60(2), 183-218, 2008