The differential Galois group of the rational function field
The differential Galois group of the rational function field
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DOI:
10.1016/j.aim.2021.107605
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发表时间:
2021
影响因子:
1.7
通讯作者:
Wibmer, Michael
中科院分区:
文献类型:
--
作者:
Bachmayr, Annette;Harbater, David;Hartmann, Julia;Wibmer, Michael
We determine the absolute differential Galois group of the field C (x) of rational functions: It is the free proalgebraic group on a set of cardinality| C|. This solves a longstanding open problem posed by BH Matzat. For the proof we develop a new characterization of free proalgebraic groups in terms of split embedding problems, and we use patching techniques in order to solve a very general class of differential embedding problems. Our result about C (x) also applies to rational function fields over more general fields of coefficients.
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DOI:
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发表时间:
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期刊:
影响因子:
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DOI:
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发表时间:
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作者:
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作者:
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