On 13/06/2010, at 7:50 AM, Manuel Pégourié-Gonnard wrote: > Actually, apart from the mathcode thing (I still need to check the difference > between \XeTeXmathcode and LuaTeX's \mathcode) You can use LuaTeX's \Umathcode; Taco wrote the unicode math support in LuaTeX to be compatible with the XeTeX extensions. -- Will