ABSTRACT For real maps, the question of the title is answered by finding all types of orbits that are available in t-simple systems. Here a t-simple system means a real map which has only finitely many types of orbits.

中文翻译：

---

哪些轨道类型只强制有限多个轨道类型？

摘要 对于真实地图，标题的问题是通过找到 t-simple 系统中可用的所有类型的轨道来回答的。这里的 t-simple 系统是指只有有限多种轨道类型的实图。