³Internally, this thorn uses “\(q\)” to refer to \(\theta \) in Fortran code, with the \(q\) function of \((\protect \ref {IDAxiBrillBH/eqn:Q})\) being hidden in the Mathematica files (and not present in the Fortran code). Noone seems to know why the code does things this way… Unfortunately, this renaming has leaked out into the parameter names…