[citizen_friend]

This. He tries to do a few epsilon delta proofs and completely gets the concept wrong. I’m surprised an editor did not stop this.

If he can’t understand a limit it really puts a question mark on whether it’s worth reading his insight into the subject.

[whatshisface]

Why would his editor know any more about it than he did?

[citizen_friend]

I would expect them to have someone with at least an undergrad in math look over the math. Editor would help identify that