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arXiv 0906.2364math.AG
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p-adic域的极大非分歧扩张上的有理连通簇

Rationally connected varieties over the maximally unramified extension of p-adic fields

Bradley Duesler, Amanda Knecht

摘要:

Graber、Harris和Starr的一个结果表明,定义在复数上的曲线的函数域上的有理连通簇总是有一个有理点。类似地,有限域上的可分离有理连通簇或任何代数闭域上的曲线的函数域将具有有理点。在这里,我们表明,合理的连接品种的最大非分歧扩张的p-adics通常,在一个精确的意义上,有有理点。这个结果与Ax和Kochen的结果一致,即p-adic通常是$C_{2}$域。证明的方法利用了一个构造从数理逻辑称为超积。利用超积将等特征情形下的de Jong,Starr结果推广到混合特征情形.

英文摘要:

A result of Graber, Harris, and Starr shows that a rationally connected variety defined over the function field of a curve over the complex numbers always has a rational point. Similarly, a separably rationally connected variety over a finite field or the function field of a curve over any algebraically closed field will have a rational point. Here we show that rationally connected varieties over the maximally unramified extension of the p-adics usually, in a precise sense, have rational points. This result is in the spirit of Ax and Kochen's result saying that the p-adics are usually $C_{2}$ fields. The method of proof utilizes a construction from mathematical logic called the ultraproduct. The ultraproduct is used to lift the de Jong, Starr result in the equicharacteristic case to the mixed characteristic case.

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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