This procedure checks to see if the given name, f, is the name of a mathematical function known to Maple.

The definition of a mathematical function, in this context, is heuristic but reasonably effective: A name, , is considered to represent a mathematical function if either  has been defined as an operator or there exists a routine called .  (See evalf for more details about numerical evaluation of functions and expressions.)

The following top-level mathematical functions are known to type/mathfunc:

`evalf/h` := proc(x) evalf(x^2); end: