abuseofnotation/category-theory-illustrated

Singlton Example

phikal opened this issue · 4 comments

In the "Singleton Set" section it says:

The set of books written by the American writer Harper Lee and published during her lifetime is a singleton set - she has published just one novel.

Which isn't quite true, since 2015 she published "Go Set a Watchman".

I know this is being pedantic and not the point of the explanation, but I guess it could confuse someone who knows a lot more about American literature than set theory.

Haha, well to my defense this was written before 2015.

What are some examples of writers with one published book?

On a sad note, I also would like to add that "The set of queens of England" is now not a "singleton set", but an "empty set".

I rewrote the example about the queens of England and decided to remove the second example.

The example with the king/queen is good because the king/queen is one by definition (the one with the capital is good too, but it is conceptually very similar to the one with the one about the kings)

Thanks @phikal, for the suggestions.