Author: Urs Format: MarkdownItexa stub entry, for the moment just to make the link work
<a href="https://ncatlab.org/nlab/revision/Andrews%E2%80%93Curtis+conjecture/1">v1</a>, <a href="https://ncatlab.org/nlab/show/Andrews%E2%80%93Curtis+conjecture">current</a>
a stub entry, for the moment just to make the link work