Related and useful to know: https://en.wikipedia.org/wiki/Combinatorial_species https://en.wikipedia.org/wiki/Combinatorial_species Also: https://en.wikipedia.

Related and useful to know: https://en.wikipedia.org/wiki/Combinatorial_species https://en.wikipedia.org/wiki/Combinatorial_species Also: https://en.wikipedia.org/wiki/Brzozowski_derivative https://en.wikipedia.org/wiki/Brzozowski_derivative Good to know about these: https://en.wikipedia.org/wiki/Dual_number https://en.wikipedia.org/wiki/Dual_number Seems comprehensive: https://semantic-domain.blogspot.com/2021/02/five-and-half-derivatives-in-language.html https://semantic-domain.blogspot.com/2021/02/five-and-half-d...