Summary
We give a generalization of Jakobson's theorem [Ja] and a precise estimate for the density of parameters corresponding to systems with absolutely continuous invariant measures.
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Dedicated to the memory of Prof. Gikō Ikegami
Oblatum 11-III-1992
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Tsujii, M. Positive Lyapunov exponents in families of one dimensional dynamical systems. Invent Math 111, 113–137 (1993). https://doi.org/10.1007/BF01231282
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DOI: https://doi.org/10.1007/BF01231282