# Mathematical symbols as keywords in listing

Is it possible to use mathematical symbols as keywords in listing? I'm using listings package to typeset Mathematica code and I have used emph parameter of lstset to use blue bold font for some of my functions like

\lstset{
emph={CoolFun1, CoolOp2},
emphstyle={\color{blue}\bfseries}
}


I would like also to use some functions named with mathematical symbols, \eg\ Greek names like $\delta$ and so on. So the goal is to have something like

\lstset{
emph={CoolFun1, $\delta$},
emphstyle={\color{blue}\bfseries}
}


and obtain Mathematica listings with bold blue mathematical symbols.

• Welcome to TeX.SX! You can have a look at our starter guide to familiarize yourself further with our format. – Sean Allred Aug 13 '13 at 11:47

A feature of listings that can come in handy in these situation is the literate option.
If you are happy with writing delta in your listing instead of $\delta$ and get it replaced with the symbol by listings then here's a solution:
\lstset{
{delta}{{$\color{blue}\delta$}}1