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Hyers-Ulam stability of loxodromic Möbius difference equation (1808.09813v1)

Published 28 Aug 2018 in math.DS

Abstract: Hyers-Ulam of the sequence $ {z_n}{n \in \mathbb{N}} $ satisfying the difference equation $ z{i+1} = g(z_i) $ where $ g(z) = \frac{az + b}{cz + d} $ with complex numbers $ a $, $ b $, $ c $ and $ d $ is defined. Let $ g $ be loxodromic M\"obius map, that is, $ g $ satisfies that $ ad-bc =1 $ and $a + d \in \mathbb{C} \setminus [-2,2] $. Hyers-Ulam stability holds if the initial point of $ {z_n}_{n \in \mathbb{N}} $ is in the exterior of avoided region, which is the union of the certain disks of $ g{-n}(\infty) $ for all $ n \in \mathbb{N} $.

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