156 karma · joined July 5, 2019
The author studied at CMU, where the proudly-paraded slogan for an introductory functional programming classes is "Functions are values", which has an almost cult-like status - appearing on their TA hoodies, laptop stickers, and so on.
Other classes soon caught on, first with the imperative programming class declaring that "Functions are pointers", then the introductory discrete math class's "Functions are tuples", and even "Functions are relations" from the databases class.
So viewed in this lens, passing up the opportunity to title it what it was would have been unthinkable.
Which is a great point on why the average quality of LaTeX homework submissions by undergraduates without any research experience usually makes for a less-than-ideal grading experience. And this is not about the nit-picky mistakes, but the visually glaring ones.
Also, you are right about using \mathrm{d}x. Another friend also just flagged it to me as well, I will update the post regarding this!