(self)
return free
Return a set of symbols other than the bound symbols used to
        parametrically define the Curve.

        Examples
        ========

        >>> from sympy.abc import t, a
        >>> from sympy.geometry import Curve
        >>> Curve((t, t**2), (t, 0, 2)).free_symbols
        set()
        >>> Curve((t, t**2), (t, a, 2)).free_symbols
        set([a])
Return a set of symbols other than the bound symbols used to
        parametrically define the Curve.
Return a set of symbols other than the bound symbols used to parametrically define the Curve .
def free_symbols(self):
        """
        Return a set of symbols other than the bound symbols used to
        parametrically define the Curve.

        Examples
        ========

        >>> from sympy.abc import t, a
        >>> from sympy.geometry import Curve
        >>> Curve((t, t**2), (t, 0, 2)).free_symbols
        set()
        >>> Curve((t, t**2), (t, a, 2)).free_symbols
        set([a])
        """
        free = set()
        for a in self.functions + self.limits[1:]:
            free |= a.free_symbols
        free = free.difference(set([self.parameter]))
        return free
def free_symbols ( self ) : free = set ( ) for a in self . functions + self . limits [ 1 : ] : free |= a . free_symbols free = free . difference ( set ( [ self . parameter ] ) ) return free