This paper focus on the existence and uniqueness of periodic waves for a BBM equation with local strong generic delay convection and weak diffusion. By analyzing the corresponding Hamiltonian system, we aim to obtain the existence of periodic orbit by constructing a locally invariant manifold according to geometric singular perturbation theory. Chebyshev criteria is applied to investigate the ratio of Abelian integrals. We prove the existence and uniqueness of periodic wave solution with sufficiently small perturbation parameter. Moreover, the upper and lower bounds of the limiting wave speed are given.
Keywordsdelayed BBM equation • geometric singular perturbation theory • periodic wave • Abelian integrals Mathematics Subject Classification (2020) 34C25 • 34C60 • 37C27 1 IntroductionTraveling wave solutions plays an important role in many mathematically modelled phenomena. It can be applied in comparison principles and characterize the long-term behaviour in numerous situations in conformance with