Abstract
The Bäcklund transformations and abundant exact explicit solutions for a class of nonlinear wave equation are obtained by the extended homogeneous balance method. These solutions include the solitary wave solution of rational function, the solitary wave solutions, singular solutions, and the periodic wave solutions of triangle function type. In addition to rederiving some known solutions, some entirely new exact solutions are also established. Explicit and exact particular solutions of many well‐known nonlinear evolution equations which are of important physical significance, such as Kolmogorov‐Petrovskii‐Piskunov equation, FitzHugh‐Nagumo equation, Burgers‐Huxley equation, Chaffee‐Infante reaction diffusion equation, Newell‐Whitehead equation, Fisher equation, Fisher‐Burgers equation, and an isothermal autocatalytic system, are obtained as special cases.
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