Contraction conjecture for positively curved Euclidean weighted manifolds

From papers

Let (Rn,g,μ)(\mathbb{R}^n,g,\mu) satisfy CD(ρ,)CD(\rho,\infty) with ρ>0\rho>0, and let γρn\gamma^n_\rho be the nn-dimensional Gaussian measure. A map pushes forward γρn\gamma^n_\rho onto μ\mu up to a finite constant if its pushforward measure is proportional to μ\mu, and it contracts the corresponding metrics when it is 11-Lipschitz. Contraction conjecture. There exists a map

T:(Rn,,γρn)(Rn,g,μ)T:(\mathbb{R}^n,\lvert\cdot\rvert,\gamma^n_\rho)\longrightarrow(\mathbb{R}^n,g,\mu)

pushing forward γρn\gamma^n_\rho onto μ\mu up to a finite constant and contracting the corresponding metrics. Motivated by Caffarelli’s contraction theorem and Gaussian comparison results, this conjecture would imply the spectral comparison conjecture through the contraction principle. The source gives no resolution.

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Sources & referencesView supporting material

Primary source

Emanuel Milman, “Spectral Estimates, Contractions and Hypercontractivity”, arXiv:1508.00606 (2018).

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