and The Joy of x https://www.stevenstrogatz.com/books/the-joy-of-x https://www.stevenstrogatz.com/books/the-joy-of-x (for the title which these are all shout

and The Joy of x https://www.stevenstrogatz.com/books/the-joy-of-x https://www.stevenstrogatz.com/books/the-joy-of-x (for the title which these are all shout outs to, see [Comfort72])