Author here. I rendered (most of the) equations with QuickLaTeX (https://quicklatex.com/), and put the illustrations together in Inkscape by hand (https://inkscape.org/).

Hi there, author here. I have removed the paywall for this and all future posts. I am new to Substack, and still experimenting with the proper format. This change has been in my mind for a while, so I went and removed the paywall from all of my posts, and left the paid subscription as a supporting option.

Hey, just wanted to chime in that your post is nice.

Now, I wish substack had support for math. Adding formulas in images isn't that bad (and practically unavoidable if you want to draw functions - unless you write js), but, still.

Thank you for doing this and also somehow popping in here