User blog comment:Rgetar/FGH-based notation for natural numbers/@comment-35470197-20190426042119

Interesting, but I could not understand several explanations.

> So, we defined otn(α).

I could not understand the role of otn.

> Also, for string X, α.n (where X is a string)

What does this sentence mean? Is this an explanation of a restriction of X? What is a relation between X and α.n?