Hi,
I've got some problems on the following:
Let f:\mathbb{R} \to \mathbb{R} be a twice differentiable function with \lim_{x \to \infty} \frac{|f(x)|}{|x^2|}=0 and \int_{-\infty}^{\infty} |f''(x)| dx is bounded.
Let
F(y) = \int_{-\infty}^{\infty} f(x) e^{-2 \pi ixy} dx
be the Fourier...