this post was submitted on 10 Apr 2026
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What are we seeing here?
I believe they are higher dimensional string diagrams. Maybe called n-diagrams? They are used in higher homotopy and higher category theory, I believe. But not entirely sure.
https://arxiv.org/pdf/2305.06938
EDIT: Found it! they are called surface diagram, which are generalization of string diagram to 3-categories https://golem.ph.utexas.edu/category/2010/03/modeling_surface_diagrams.html https://ncatlab.org/nlab/show/surface+diagram
Still not sure what the proof is talking about though :(
When I got to asking "WTF does naturality even means?", I decided to reread your comment from the beginning...
The amount of words in it that almost nobody will know the meaning is amazing!