\definemathcommand[xyz][nolop]{\text{fancy-function-name'*.:}}
The problem with this solution is that the font of the operator becomes the normal text font whereas I want to use the standard math upright font (so \mfunction + \kern\zeropoint + \newmathcodes is the way to go). For instance with \setupbodyfont[sansserif] the operator name becomes sans serif, which I don't want. I only need to make this code compile: \begingroup \catcode`\"=12 \gdef\newmcodes@{\mathcode`\'39\mathcode`\*42\mathcode`\."613A% \ifnum\mathcode`\-=45 \else \mathchardef\std at minus\mathcode`\-\relax \fi \mathcode`\-45\mathcode`\/47\mathcode`\:"603A\relax} \endgroup \definemathcommand[xyz][nolop]{\newmcodes@ \kern\zeropoint\mfunction{fancy-function-name'*.:}} \starttext \xyz \stoptext How can I do that? The compilation fails at the \ifnum condition. Isn't \ifnum a ConTeXt macro? Maggyero