What's the name of the equation x/(sqrt(x^2)+1)?

I know it has some special name, since I stumbled on the wiki page for it only once, but for the life of me, I cant find even a hint of it in the last

I know it has some special name, since I stumbled on the wiki page for it only once, but for the life of me, I can't find even a hint of it in the last two weeks I've been searching for it... all I do know is that it has something to do with it's "special" properties of being both injective and having limits of -1 and 1

or:I know it has some special name, since I stumbled on the wiki page for it only once, but for the life of me, I can't find even a hint of it in the last two weeks I've been searching for it... all I do know is that it has something to do with it's \"special\" properties of being both injective and having limits of -1 and 1

or:en.wikipedia.org/wiki/Witch_of_Agnesi Pretty close.

Tags:equations,