Author: Urs Format: MarkdownItexadded to _[[invariant]]_ a section, [here](http://ncatlab.org/nlab/show/invariant#ViaSectionsOfActionGroupoidProjections), with detailed exposition of how invariants are equivalently sections of the action groupoid projection
added to invariant a section, here, with detailed exposition of how invariants are equivalently sections of the action groupoid projection
Author: Urs Format: MarkdownItexadded a section *Examples* ([here](https://ncatlab.org/nlab/show/invariant#Examples)) with an item-list of all nLab entries on examples of invariants
(this leaves much room for fine-tuning)
<a href="https://ncatlab.org/nlab/revision/diff/invariant/16">diff</a>, <a href="https://ncatlab.org/nlab/revision/invariant/16">v16</a>, <a href="https://ncatlab.org/nlab/show/invariant">current</a>
added a section Examples (here) with an item-list of all nLab entries on examples of invariants