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arXiv 1105.2660math.AGmath.LO
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实封闭的域上的仿射Nash群

Affine Nash groups over real closed fields

Ehud Hrushovski, Anand Pillay

摘要:

证明了实封闭的域R上的半代数连通仿射Nash群与定义在R上的某个代数群H的R-点群H(R)的半代数连通分支Nash同构。在R是实数域的情况下,这一结果在Israel J.Math.85(1994)中的“Groups definable in局部域and pseudofinite fields”一文中得到了证明,但最近发现证明中的一个错误,我们得到的新证明具有在任意实封闭的域上有效的优点.我们还将结果推广到任意实封闭的域上的不一定连通的仿射纳什群。

英文摘要:

We prove that a semialgebraically connected affine Nash group over a real closed field R is Nash isogenous to the semialgebraically connected component of the group H(R) of R-points of some algebraic group H defined over R. In the case when R is the field of real numbers this result was claimed in the paper "Groups definable in local fields and pseudofinite fields", Israel J. Math. 85 (1994) by the same two authors, but a mistake in the proof was recently found, and the new proof we obtained has the advantage of being valid over an arbitrary real closed field. We also extend the result to not necessarily connected affine Nash groups over arbitrary real closed fields.

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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