中文

赋值环的弱非分歧扩张的构造

交换代数 2022-06-13 v3 代数几何

摘要

给定赋值环 VV,其剩余域为 FF、值群为 Γ\Gamma,我们给出一个局部环支配 VV 且为具有相同值群的赋值环的充分条件。当 VV 含有一个域 kk 时,我们将此结果应用于构造一个包含 VV 及给定 kk 的扩张 kk'、具有值群 Γ\Gamma 且剩余域由 kk'FF 生成的赋值环 WW 的问题;特别地,当 kk'FFkk 上可分时,这是可能的。Given a valuation ring VV, with residue field FF and value group Γ\Gamma, we give a sufficient condition for a local ring dominating VV to be a valuation ring with the same value group. When VV contains a field kk, we apply this result to the problem of constructing a valuation ring WW containing VV and a prescribed extension kk' of kk, with value group Γ\Gamma and residue field generated by kk' and FF; this is possible in particular when either kk' or FF is separable over kk.

关键词

引用

@article{arxiv.1909.02917,
  title  = {Une construction d'extensions faiblement non ramifi\'ees d'un anneau de valuation},
  author = {Laurent Moret-Bailly},
  journal= {arXiv preprint arXiv:1909.02917},
  year   = {2022}
}

备注

11 pages, in French. Published in Rend. Sem. Mat. Univ. Padova (Online first)