On trees covering chains or stars
classification
🧮 math.AG
math.CO
keywords
chainsstarstheorytreeapplicationsarithmeticalbesidesclasses
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In this paper, in the context of the ``Dessins d'enfants'' theory, we give a combinatorial criterion for a plane tree to cover a tree from the classes of "chains" or "stars''. Besides, we discuss some applications of this result which are related to the arithmetical theory of torsion on curves.
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