C. Georgakis, THE CONVERGENCE OF THE FOURIER INTEGRAL OF A UNIMODAL DISTRIBUTION, Proceedings of the American Mathematical Society, 126(11), 1998, pp. 3239-3241
We show that the characteristic function of a unimodal probability dis
tribution function can be inverted by the Fourier transform a.e. if an
d only if the distribution is absolutely continuous. The result comple
ments Khintchine's criterion for unimodal distributions.