On Symmetric Sensitivity
Benoit Cadre, Pierre Jacob
Abstract
We define the concept of symmetric sensitivity with respect to initial conditions for the endomorphisms on Lebesgue metric spaces. The idea is that the orbits of almost every pair of nearby initial points (for the product of the invariant measure) of a symmetrically sensitive map may diverge from a positive quantity independent of the initial points. We study the relationships between symmetric sensitivity and weak mixing, symmetric sensitivity and positiveness of metric entropy and we compute the largest sensitivity constant.
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