科研之友
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摘要
We construct a smooth rational affine surface S with finite automorphism group but with the property that the group of automorphisms of the cylinder S x A(2) acts infinitely transitively on the complement of a closed subset of codimension at least two. Such a surface S is in particular rigid but not stably rigid with respect to the Makar-Limanov invariant.
- 出版日期2015
