Skip to main content
1 of 3
sciona
  • 211
  • 1
  • 4

Is $\frac{\sin |\xi|}{|\xi|}$ in range of Fourier Transform for $n \ge 3$?

Does there exist $f \in L^1(\mathbb{R}^n)$ s.t., $\displaystyle \widehat{f}(\xi) = \frac{\sin |\xi|}{|\xi|}$ in caser of dimension $n \ge 3$?

It is known that for $n = 2$, the function $\displaystyle f(x) = \frac{\chi_{\{|x| < 1\}}}{\sqrt{1-|x|^2}}$ curiously has some constant multiple of $\dfrac{\sin |\xi|}{|\xi|}$ as Fourier Transform. Or atleast is there a way of finding the fourier transform $\frac{\sin |\xi|}{|\xi|}$ in sense of Tempered distributions for $n \ge 3$?

sciona
  • 211
  • 1
  • 4