@Article{Oprocha2010, author = "Oprocha, Piotr and Wilczyński, Paweł", title = "A study of chaos for processes under small perturbations II: rigorous proof of chaos", journal = "Opuscula Math.", year = "2010", volume = "30", number = "1", pages = "5--36", doi = "http://dx.doi.org/10.7494/OpMath.2010.30.1.5", url = "http://dx.doi.org/10.7494/OpMath.2010.30.1.5", abstract = "In the present paper we prove distributional chaos for the Poincaré map in the perturbed equation \[\dot{z}=\left(1 + e^{i\kappa t} |z|^2\right)\bar{z}^2 - N e^{-i\frac{\pi}{3}}.\] Heteroclinic and homoclinic connections between two periodic solutions bifurcating from the stationary solution \(0\) present in the system when \(N = 0\) are also discussed.", keywords = "distributional chaos, isolating segments, fixed point index, bifurcation", issn = "1232-9274" }