论文标题
自由循环基团的可定向地图和多项式不变性
Orientable maps and polynomial invariants of free-by-cyclic groups
论文作者
论文摘要
我们将自由循环基团的McMullen多项式与Alexander多项式联系起来。为此，我们介绍了可定向的完全不可还原的外部自动形态$φ$的概念，并在同源拉伸因子$φ$等于其几何伸展因子时使用它来表征它。
We relate the McMullen polynomial of a free-by-cyclic group to its Alexander polynomial. To do so, we introduce the notion of an orientable fully irreducible outer automorphism $φ$ and use it to characterize when the homological stretch factor of $φ$ is equal to its geometric stretch factor.
