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Approximation in difference valuation rings

Presented by: 
L Belair [UQAM]
Wednesday 2nd March 2005 - 16:00 to 17:30
INI Seminar Room 1

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.

University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons