Good Reduction of Good Filtrations at Places

Details Good Reduction of Good Filtrations at Places Good Reduction of Good Filtrations at Places

2004-11-16

arxiv.org/abs/math/0411364v2

Mathematics

Rings and Algebras

17 pages

Scientific paper

We consider filtered or graded algebras $A$ over a field $K$. Assume that there is a discrete valuation $O_v$ of $K$ with $m_v$ its maximal ideal and $k_v:=O_v/m_v$ its residue field. Let $\Lambda$ be $O_v$-order such that $\Lambda K=A$ and $\bar{\Lambda}:=k_v\otimes_{O_v}\Lambda$ the $\Lambda$-reduction of $A$ at the place $K\leadsto k_v$. Using the filtration of $A$ induced by $\Lambda$ we shall prove that for certain algebras $A$ their properties are related to $\bar{\Lambda}$.

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