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| Auteur principal: | |
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| Format: | Preprint |
| Publié: |
2026
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| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2604.20883 |
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- Let $μ_λ$ be the Bernoulli convolution measure with parameter $λ\in(0,1)$. We study the regularity of the function %We prove that $h=h_ϕ:λ\mapsto \int_{\mathbb{R}}ϕ(x)\,dμ_λ(x)$ for Hölder observables $ϕ$. We describe sufficient conditions for both smoothness and non smoothness of this function. In particular, we show that for almost every function with respect to certain Wiener like measures on $C[0,1]$, $h_ϕ$ exhibits a phase transition: it is almost nowhere differentiable for small $λ$ and it is almost everywhere differentiable for large $λ.$