return MathAtom(new InsetMathFontOld(l));
if (inset == "matrix")
return MathAtom(new InsetMathAMSArray(s));
+ if (inset == "split")
+ return MathAtom(new InsetMathSplit(s));
if (inset == "big")
// we can't create a InsetMathBig, since the argument
// is missing.