The products of variances of adjoint positive definite densities have a greatest lower bound . We improve the known estimates of showing $0.527 < \Lambda < 0.8609....
Cite this article
I. Dreier, On the Uncertainty Principle for Positive Definite Densities. Z. Anal. Anwend. 15 (1996), no. 4, pp. 1015–1023