In group theory, writing functions on the right is a common, though not universal practice.
Thus, given mappings $f$, $g$ and group element $\alpha$, one might write $\alpha f$ and $\alpha (f \circ g)$ for $f(\alpha)$ and $f(g(\alpha))$ respectively.
I can see how this makes sense in group theory, especially in relation to permutations.
I am unable to locate any information on when this practice was introduced and I suspect that it may be rather difficult to identify its origins.
Q: When was the practice of writing functions on the right introduced in group theory?