Faq/Math/007/en

How do I enter functions like max, that Math is unaware of?
Math is aware of a number of standard functions like,  ,  , etc. These functions are automatically displayed in lowercase, upright characters as per mathematical conventions (See ).

To display other characters as a function, precede them by the func markup. For example, to display  , enter

func max(a,b)

External resource
Typographical conventions in mathematical formulae on Wikipedia.