Thanks, I’ll try to do as good next time.

]]>Regarding the sentence on the terminology “strongly graded”:

I have moved it from “Properties” to “Definition” (now here)

I have hyperlinked technical terms (notably *epimorphism*)

I have added link from the text to the reference (to give readers a chance to see that there is such a reference).

In the process, I added the actual definition number.

]]>Added the notion of strongly $\mathbb{N}$ -graded algebra and an associated reference

]]>added pointer to:

- Gregory Karpilovsky, Chapter 2 of:
*The Algebraic Structure of Crossed Products*, Mathematics Studies**142**, North Holland 1987 (ISBN:9780080872537)