Geometric Transitions, Non-Kahler Geometries and String Vacua
  We summarize an explicit construction of a duality cycle for geometric transitions in type II and heterotic theories. We emphasize that the manifolds with torsion constructed with this duality cycle are crucial for understanding different phenomena appearing in effective field theories. 
Katrin Becker, Melanie Becker, Keshav Dasgupta, Radu Tatar