An approach to higher ramification theory

An approach to higher ramification theory
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更高层次理论的方法

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发表时间:
2000
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通讯作者:
I. Zhukov
I. Zhukov
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作者:
I. Zhukov

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这是赫布兰德理论 m 的高维模拟。然而,如果定义 Hasse-Herbrand 函数的泛化和较低的分枝过滤,那么对于 n > 1,子组上的较低过滤通常与诱导的过滤不一致。下面给出二维情况下L/K的分枝过滤的另一种构造;详细信息可以在[Z]中找到,另请参阅[KZ]。这种结构可以被认为是 K. Kato 和 T. Saito 在[KS]中的方法的发展。
which is a higher dimensional analogue of Herbrand’s theore m. However, if one defines a generalization of the Hasse–Herbrand function and lower r amification filtration, then for n > 1 the lower filtration on a subgroup does not coincide with the i nduced filtration in general. Below we shall give another construction of the ramification filtration of L/K in the two-dimensional case; details can be found in [Z], see also[KZ]. This construction can be considered as a development of an approach by K. Kato an d T. Saito in[KS].