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Abstract: We find the minimum dilatation of pseudo-Anosov braids on n-punctured discsfor 3 <= n <= 8. This covers the results of Song-Ko-Los n=4 and Ham-Songn=5. The proof is elementary, and uses the Lefschetz formula.



Autor: Erwan Lanneau, Jean-Luc Thiffeault

Fuente: https://arxiv.org/



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