论文标题
在刺穿映射类组的电源子组中消失的欧拉类
Vanishing of the Euler class in Power subgroups of the punctured mapping class group
论文作者
论文摘要
在本文中，我们使用大力的结果表明，某些功率亚组的欧拉类（通常由dehn Twist围绕非分离曲线产生的亚组）在曾经被刺穿的表面的映射类中很微不足道。
In this paper, we use a result of Dahmani to show that the Euler class of some power subgroup (the subgroup normally generated by a fixed power of Dehn twist about a non-separating curve) is trivial inside the mapping class group of once punctured surface.
