2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/147951The Lipatov equation can regarded as a reggeon Bethe-Salpeter equation in which higher-order reggeon interactions give higher-order kernels. Infra-red singular contributions in a general kernel are produced by t-channel nonsense states and the allowed kinematic forms are determined by unitarity. Ward identity and infra-red finiteness gauge invariance constraints then determine the corresponding scale-invariant part of a general higher-order kernel.11 pages in latex (ANH-HEP-CP-94-79), 14 figures uuencoded. Problems with the ps-encoding fixedHigh Energy Physics - Phenomenologytext