Abstract

We wish to lay out, within its historical context, one of the chief works which has led to the formulation of the early resonance dual models prior to string theory. Indeed, we shall focus on the fundamental Tullio Regge work of 1959, to be precise, on certain Mathematical methods handled by him to pursue his original intentions mainly motivated to prove the validity of the so-called Mandelstam representation for the potential scattering of two spinless particles for a given class of generalized Yukawa potentials.