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This note is concerned with the convergence (as t) to travelling waves of solutions u to the initial value problem of the KPP equation ₜ = uₗₗ + f (u), x R and t > 0. \ A travelling wave c is a solution of the form u (x, t) = c (x + ct). Estimates for the difference between u and c, in a moving coordinate system = x + ct, are given in a weighted supremum norm and in weighted Lᵖ -norm (p 1).
H. J. K. Moet (Sun,) studied this question.
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