On a dynamical version of a theorem of Rosenlicht
On a dynamical version of a theorem of Rosenlicht
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关于 Rosenlicht 定理的动力学版本
DOI:
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发表时间:
2014
期刊:
影响因子:
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通讯作者:
Z. Reichstein
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文献类型:
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作者:
J. Bell;D. Ghioca;Z. Reichstein
Consider the action of an algebraic group $G$ on an irreducible algebraic variety $X$ all defined over a field $k$. M. Rosenlicht showed that orbits in general position in $X$ can be separated by rational invariants. We prove a dynamical analogue of this theorem, where $G$ is replaced by a semigroup of dominant rational self-maps of $X$. Our semigroup $G$ is not required to have the structure of an algebraic variety and can be of arbitrary cardinality.