This paper deals with the stability of the (generalized) Kawahara equation with a time-varying delay on the boundary feedback. First, we demonstrate the well-posedness of the nonlinear Kawahara system by using semigroup theory and fixed-point arguments. Next, we establish the exponential stability of this equation by imposing conditions on the length of the spatial domain and the time-varying delay. Specifically, this result is achieved by introducing a suitable energy function and using the Lyapunov approach to ensure that the unique solution of the system decays exponentially. Finally, we present some conclusions.
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