I have some code in which I write this:
$\sim_r$. I want to use this command as a binary operator (in the same way as
$\sim$ is normally used, but with a subscript).
I would like to create a custom command so that the subscript
r appears immediately under the tilde, rather than to the right. I have tried this:
but it looks bad because there is too large a gap between the tilde and the
r. Does anyone have an easy fix?
Sorry if this is too easy a question!