Author: Tim_Porter Format: MarkdownItexAnother link dead due to changes in the Paris web addresses. Fixed
<a href="https://ncatlab.org/nlab/revision/diff/Bruno+Kahn/2">diff</a>, <a href="https://ncatlab.org/nlab/revision/Bruno+Kahn/2">v2</a>, <a href="https://ncatlab.org/nlab/show/Bruno+Kahn">current</a>
Another link dead due to changes in the Paris web addresses. Fixed