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arXiv · 1704.07494

Jet closures and the local isomorphism problem

Tommaso de Fernex·Lawrence Ein·Shihoko Ishii
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Abstract

If a morphism of germs of schemes induces isomorphisms of all local jet schemes, does it follow that the morphism is an isomorphism? This problem is called the local isomorphism problem. In this paper, we use jet schemes to introduce various closure operations among ideals and relate them to the local isomorphism problem. This approach leads to a partial solution of the local isomorphism problem, which is shown to have a negative answer in general and a positive one in several situations of geometric interest.

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Tommaso de Fernex, Lawrence Ein, Shihoko Ishii. 2017-04-24. Jet closures and the local isomorphism problem. https://arxiv.org/abs/1704.07494

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