Figure 1. The function arctan(y) for 2t0n→∞

From

On Theoretical Methodology of Nuclear Reactions and Outcome of Certain Physical Phenomena from Them. I. What Follows from the Analytical Properties of the One-channel and the Multichannel S-matrix?

V.S. Olkhovsky

American Journal of Applied Mathematics and Statistics. 2015, 3(3), 111-130 doi:10.12691/ajams-3-3-5