Author: Urs Format: MarkdownItexmade some mild cosmetic edits, such as adding more hyperlinks
<a href="https://ncatlab.org/nlab/revision/diff/category+of+couplings/3">diff</a>, <a href="https://ncatlab.org/nlab/revision/category+of+couplings/3">v3</a>, <a href="https://ncatlab.org/nlab/show/category+of+couplings">current</a>
made some mild cosmetic edits, such as adding more hyperlinks