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Homotopy perturbation technique. (English) Zbl 0956.70017
Summary: The homotopy perturbation technique does not depend upon a small parameter in the equation. By the homotopy technique in topology, a homotopy can be constructed with an imbedding parameter $p\in \left[0,1\right]$, which is considered as a “small parameter”. Here we give some examples, and demonstrate that the approximations obtained by the proposed method are uniformly vaild not only for small parameters, but also for very large parameters.

##### MSC:
 70K60 General perturbation schemes (nonlinear dynamics) 70-08 Computational methods (mechanics of particles and systems) 34E10 Perturbations, asymptotics (ODE)