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arXiv 0908.1146math.AG
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喷流格式的同构

Isomorphisms of jet schemes

Shihoko Ishii, Joerg Winkelmann

摘要:

若两个格式同构,则它们的$m$ -jet格式对所有$m$同构.在本文中,我们考虑逆问题。证明了如果$m$ -jet格式的同构是由基格式的态射导出的,则基格式的态射是同构.但我们也证明了,只是存在的同构之间的$m$ -喷气计划并不产生存在的同构之间的基础计划。

英文摘要:

If two schemes are isomorphic, then their $m$-jet schemes are isomorphic for all $m$. In this paper we consider the converse problem. We prove that if an isomorphism of the $m$-jet schemes is induced from a morphism of the base schemes, then the morphism of the base schemes is an isomorphism. But we also prove that just the existence of isomorphisms between $m$-jet schemes does not yield the existence of an isomorphism between the base schemes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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