(self)
return set(sorted(self.variables.keys()))
Get the set of all variables
        present in the monomial.
Get the set of all variables
        present in the monomial.
Get the set of all variables present in the monomial .
def all_variables(self) -> Set:
        """
        Get the set of all variables
        present in the monomial.
        """
        return set(sorted(self.variables.keys()))
def all_variables ( self ) -> Set : return set ( sorted ( self . variables . keys ( ) ) )