About a year ago there was suggestion to rename the tag (divergence) to name which indicates more clearly that it is not about divergence of series but about the notion in vector calculus.
So basically what I am saying is that divergence-operator → div-grad-curl might be slightly better. (And it would be also in accordance with the post which I linked above and which is now at score 18.)
Hm, the link to chatwas supposed to be to this conversation: Renaming the (divergence) tag. To get a working link, I probably should not have added full stop right after url.
But if it's going to be synonymized to (div-grad-curl) as Alexander Gruber indicated, I still think that it would be a bit better with the more specific name.