A once-subtracted form of the Low equation for the pion-nucleon scattering amplitude is derived, with PCAC used to define the amplitude when one pion is off the

Synthesizing the theoretical and experimental advances in pion-nucleon interactions over approximately the last twelve years, the authors offer here a timely ac

A theory of the .pi.N interaction at low energy is described. An analogy is made with an unusual approach to potential scattering theory. Phase shifts, cross se