arithmeticFunctionSet is an untyped function set containing the functions
"+", "-", "*", and "/".
expLogFunctionSet is an untyped function set containing the functions
"sqrt", "exp", and "ln".
trigonometricFunctionSet is an untyped function set containing the functions
"sin", "cos", and "tan".
mathFunctionSet is an untyped function set containing all of the above functions.
arithmeticFunctionSet
expLogFunctionSetNULL
numericConstantSet is an untyped constant factory set containing a single
constant factory that creates numeric constants via calls to runif(1, -1, 1).Note that these objects are initialized in the RGP package's .onAttach function.