I want to create an operator that works like a minus sign (including the spacing), but has the characters
res on top (in
\textrm mode). The length of the minus sign should be adjusted to look like underlining the
res characters, and it needs to work in a subscript. Currently I am using
which means in particular the operator I am using is
but it leaves a bit of space between the two dashes (especially in subscripts), and in inline or display mode, there's too much line to the left of the letters
What is a better way to produce this symbol?