One day I will find an excuse to write dₚf(TₚX) simply as df(TX)ₚ in my papers

Today's task: I'm thinking of some loophole to make this abuse of notation somehow valid

A Mastodon instance for maths people. The kind of people who make $$\pi z^2 \times a$$ jokes. Use $$ and $$ for inline LaTeX, and $ and $ for display mode.