[Question] What technical topics could help with boundaries/​membranes?

I want to compile a list of topics that could help inspire formal/​mathematical abstractions for boundaries/​membranes. (See my recent explainer.)

What technical topics are related to boundaries/​membranes?

I’ve seeded the comments with some ideas. Please keep further comments organized in threads if possible. Also, please add high quality links to existing comments by others.

No comments.