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Approximation in difference valuation rings

Belair, L (UQAM)
Wednesday 02 March 2005, 16:00-17.30

Seminar Room 1, Newton Institute


I will discuss a result analogous to a theorem of Greenberg on an approximation property in henselian discrete valuation rings, but for polynomial equations involving also a fixed automorphism. In the case of Witt vectors and their Frobenius, a nullstellensatz for these equations can be deduced.

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