Starting next year, our mathematics course introduces a new symbol for independant variables. The independance of X and Y is symbolized with :

I couldn't find this symbol within texmacs. What is the best way to obtain it ? Using the <move|content> and two perpendicular (\perp) symbols I could obtain somewhat what I need, but hardcoding the horizontal deplacement (-2mm for a 10pt document looks ok) depends on the size of the font, so it is really not ideal...

Any pointer to the right direction is welcome !

Regards,

Pierre-Henri