An Uncertainty Principle for Topological Sectors Zurich, July 2, 2007 TexPoint fonts used in EMF: AA A AAA A A AA A A A Based on: hep-th/0605198, hep-th/0605200.
The RR charge of orientifolds arXiv:0906.0795 and work in progress with Jacques Distler & Dan Freed TexPoint fonts used in EMF: AA A A A A A AA A A A A.
