Tame coverings of arithmetic schemes

Details Tame coverings of arithmetic schemes Tame coverings of arithmetic schemes

2000-05-31

arxiv.org/abs/math/0005310v1

Mathematics

Number Theory

Scientific paper

We extend the notion of a tame covering of a pair (X,D) where X is a regular scheme and D is a normal crossing divisor (cf. SGA1), to pairs (X,Y) where X is an arbitrary scheme and Y is a closed subset in X. We show that the abelianized tame fundamental group of a regular scheme which is flat and of finite type over Spec(Z) is finite and does not depend on the choice of a particular compactification.

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