Author: Urs Format: MarkdownItexsplitting this off from *[[center]]* in order to break out of some odd link-structure
<a href="https://ncatlab.org/nlab/revision/center+of+a+category/1">v1</a>, <a href="https://ncatlab.org/nlab/show/center+of+a+category">current</a>
splitting this off from center in order to break out of some odd link-structure