We show that transcendental curves in Rn (not necessarily compact)
have few rational points of bounded height provided that the curves are well
behaved with respect to algebraic sets in a certain sense and can be
parametrized by functions belonging to a specified algebra of infinitely
differentiable functions. Examples of such curves include logarithmic spirals
and solutions to Euler equations x2y′′+xy′+cy=0 with c>0