limit notation $x \rightarrow 1^-$? I am looking for a clarification of the following notation:
$$\lim_{x\rightarrow1^-}f(x)$$
In particular, does the $1^-$ mean that $1$ is approached from below in the limit?

Yes, it means exactly that $1$ is approached from below.  Formally, $L=\lim_{x\to 1^-}f(x)$ means that for every $\epsilon>0$ there exists a $\delta>0$ such that whenever $1-\delta<x<1$, $|f(x)-L|<\epsilon$.
