Labeled and Non-labeled Extended Rauzy Classes
  Multiple conventions have been adopted for denoting Interval Exchange Transformations (IETs). The "non-labeled" convention was the original, while the "labeled" convention has proven convenient when investigating Flat Surfaces as described by IETs. We establish the relationship between Extended Rauzy Classes, an equivalence class of combinatorial data related to IETs, under each convention. 
Jon Fickenscher
math.DS math.CO math.GT