New answers tagged mathspec
Yes. If you want to use mathspec, then at present you need to run XeLaTeX. (The mathspec package pre-dates wide availability of LuaTeX.) There are few technical reasons for this, but mathspec does use one primitive that would need to be emulated in LuaTeX before it could fully supported: \XeTeXglyphbounds — this is used in the \" and " definitions to ...
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