Bewege den Punkt P !

A = Point(yAxis)
a: y(A)
M: (0.0, a / 2.0)
c = Circle(M, a / 2.0)
d: 1.0 * y = a
O = (0, 0)
P = Point(c)
e = Ray(O, P)
C = Intersect(d, e)
g: 1.0 * x = x(C)
f: 1.0 * y = y(P)
S = Intersect(g, f)
b = CurveCartesian(a * t, a / (t^(2.0) + 1.0), t, -10.0, 10.0)