# How do I typeset functions and operators, such as max or det, that Math does not know about?

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**How do I typeset functions, such as max, det, that Math does not know about?**

*Math* has a number of standard functions built-in, such as
cos, log etc.

These functions are typeset in an upright shape according to typographical traditions.

To typeset other functions this way you can simply preceed the
function with** func**.

Example:

To typeset max(*a,b*) you should enter** func max(a,b)**.

If you want to use *max* as an operator, like *lim*, you can use csub to get a centered subscript: ** func max csub {x in S} f(x)****.**