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arXiv 1001.0645math.AG
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Grothendieck Chow动机的一个下降定理

A going down theorem for Grothendieck Chow motives

Charles De Clercq

摘要:

设X是域F上满足Rost零值原理的几何可裂几何不可约簇.考虑一个域扩张E/F和一个有限域K。本文提供了一个动机工具,给出了系数为K的X_E的Chow动机的直和项的所谓外动机提升到基域的充分条件。这一下降结果已被S.加里波第、彼得罗夫和N. Semenov给出了E_6内型投射齐次簇的motivic分解的一个完全分类,并回答了Rost和Springer的一个猜想。

英文摘要:

Let X be a geometrically split, geometrically irreducible variety over a field F satisfying Rost nilpotence principle. Consider a field extension E/F and a finite field K. We provide in this note a motivic tool giving sufficient conditions for so-called outer motives of direct summands of the Chow motive of X_E with coefficients in K to be lifted to the base field. This going down result has been used S. Garibaldi, V. Petrov and N. Semenov to give a complete classification of the motivic decompositions of projective homogeneous varieties of inner type E_6 and to answer a conjecture of Rost and Springer.

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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