Author: Urs Format: MarkdownItexthe link to the Oberwolfach Report pdf had ceased to work. So I have ([here](https://ncatlab.org/nlab/show/Oberwolfach+Workshop%2C+June+2009+--+Strings%2C+Fields%2C+Topology#OWR-2009-28)) replaced it by a working link and also uploaded the report to the nLab server
<a href="https://ncatlab.org/nlab/revision/diff/Oberwolfach+Workshop%2C+June+2009+--+Strings%2C+Fields%2C+Topology/45">diff</a>, <a href="https://ncatlab.org/nlab/revision/Oberwolfach+Workshop%2C+June+2009+--+Strings%2C+Fields%2C+Topology/45">v45</a>, <a href="https://ncatlab.org/nlab/show/Oberwolfach+Workshop%2C+June+2009+--+Strings%2C+Fields%2C+Topology">current</a>
the link to the Oberwolfach Report pdf had ceased to work. So I have (here) replaced it by a working link and also uploaded the report to the nLab server