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Characteristic polyhedra of singularities without completion: part II
Collectanea Mathematica ( IF 1.1 ) Pub Date : 2020-06-22 , DOI: 10.1007/s13348-020-00291-5
Vincent Cossart , Bernd Schober

Hironaka’s characteristic polyhedron is an important combinatorial object reflecting the local nature of a singularity. We prove that it can be determined without passing to the completion if the local ring is a G-ring and if additionally either it is Henselian, or a certain polynomiality condition (Pol) holds, or a mild condition (*) on the singularity holds. For example, the latter is fulfilled if the residue field is perfect.



中文翻译:

未完成的奇异性特性多面体:第二部分

弘中的特征多面体是一个重要的组合对象,反映了奇异点的局部性质。我们证明,如果局部环是G环,并且另外是Henselian,或者某个多项式条件(Pol)成立,或者在奇异性上是一个温和条件(*),那么就可以确定它,而无需完成。 。例如,如果残差字段是完美的,则满足后者。

更新日期:2020-06-23
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