• The app "The cosmic travel planner" was developped by Prof. Bär for his lectures on relativity theory. This is a re-implementation based on the open computer algebra system SageMath. The original version, based on Maple, won an international software competition.
  • The Mod-N-Calculator is a calculator which computes modulo N where N can be chosen.
  • The Surface Calculator was developped as part of Jörg Kapelle's bachelor thesis. It visualizes surfaces in space and their geodesics and computes a variety of geometric quantities (first and second fundamental form, mean and Gauss curvature, ...). A short tutorial can be found here.
  • The interactive exercises are based on SageMath and allow you to practice basic mathematical skills.