“…Before that, we give an easy proof (independently from the results about quotients of dynamical systems) that for the Lelek fan L, there is a homeomorphism (as well as a continuous function which is not a homeomorphism) f : L → L such hat (L, f ) is chaotic in the sense of Robinson but not in the sense of Devaney. To do this, we first recall the basic construction from [8] We also define the set M r,ρ by M r,ρ = X + L r,ρ and we use σ r,ρ to denote the shift map σ + L r,ρ on M r,ρ . In the following theorem, we prove that the dynamical system from Theorem 5.3 also has sensitive dependence on initial conditions.…”