$\phi^4$ equation

Mathematical Analysis of Fractal Kink-Antikink Collisions in the $\varphi^4$ Model
Mathematical Analysis of Fractal Kink-Antikink Collisions in the $\varphi^4$ Model
Kink-antikink collisions in the $\phi^4$ equation: The $n$-bounce resonance and the separatrix map
Kink-antikink collisions in the $\phi^4$ equation: The $n$-bounce resonance and the separatrix map