Your math is nice and clear and I enjoyed reading this article with accessible technical detail.

Thank you

Your presentation of it could use a little more whitespace (around the composition dots (which could be · instead of .),

Right. Some of that is the LW engine eats whitespace in <pre> elements for some reason.

Or actually use LaTeX for standard formatting; I'd be happy to help with the conversion.

This is probably what I should do. I'll take a look at your link and see what I can do. If I have questions, you volunteered.