# Tagged Questions

2answers
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### What does this syntax mean: “$f^{-1} : N_{10} \Rightarrow N_b$ is the inverse of $f: N N_{b} \Rightarrow N_{10}$?”

I'm trying to solve this but I haven't seen syntax like this before. Can someone please explain the syntax? http://i.imgur.com/GO1Ki.png The image is Show that the one-to-one function \$f^{-1} : ...
1answer
138 views

### Inverse function notation

Suppose $f$ and $g$ are functions that fail to be one-to-one, but $f+g$ is one-to-one. Has anyone ever seen the notation $(f+g)^{-1}$ for the inverse function in that situation? (I find myself ...
1answer
207 views

### $\operatorname{arsinh}$ vs $\operatorname{arcsinh}$

I note that some people like to write the inverse hyperbolic functions not with the prefix "arc" (like regular inverse trigonometric functions), but rather "ar". This is because the prefix "arc" (for ...
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