Rényi's entropy on Lorentzian spaces. Timelike curvature-dimension conditions

M Braun - Journal de Mathématiques Pures et Appliquées, 2023 - Elsevier
For a Lorentzian space measured by m in the sense of Kunzinger, Sämann, Cavalletti, and
Mondino, we introduce and study synthetic notions of timelike lower Ricci curvature bounds …

On the topology and the boundary of N–dimensional RCD (K, N) spaces

V Kapovitch, A Mondino - Geometry & Topology, 2021 - msp.org
We establish topological regularity and stability of N–dimensional RCD (K, N) spaces (up to
a small singular set), also called noncollapsed RCD (K, N) in the literature. We also …

Metric measure spaces and synthetic Ricci bounds: fundamental concepts and recent developments

KT Sturm - European Congress of Mathematics, 2023 - ems.press
Metric measure spaces with synthetic Ricci bounds have attracted great interest in recent
years, accompanied by spectacular breakthroughs and deep new insights. In this survey, I …

An optimal transport formulation of the Einstein equations of general relativity

A Mondino, S Suhr - Journal of the European Mathematical Society, 2022 - ems.press
The goal of the paper is to give an optimal transport formulation of the full Einstein equations
of general relativity, linking the (Ricci) curvature of a space-time with the cosmological …

[HTML][HTML] Super-Ricci flows for metric measure spaces

KT Sturm - Journal of Functional Analysis, 2018 - Elsevier
We introduce the notions of 'super-Ricci flows' and 'Ricci flows' for time-dependent families
of metric measure spaces (X, dt, mt) t∈ I. The former property is proven to be stable under …

Tamed spaces–Dirichlet spaces with distribution-valued Ricci bounds

M Erbar, C Rigoni, KT Sturm, L Tamanini - Journal de Mathématiques Pures …, 2022 - Elsevier
We develop the theory of tamed spaces which are Dirichlet spaces with distribution-valued
lower bounds on the Ricci curvature and investigate these from an Eulerian point of view. To …

[HTML][HTML] Measure rigidity of synthetic lower Ricci curvature bound on Riemannian manifolds

BX Han - Advances in Mathematics, 2020 - Elsevier
In this paper we investigate Lott-Sturm-Villani's synthetic lower Ricci curvature bound on
Riemannian manifolds with boundary. We prove several measure rigidity results related to …

Stability estimates for the sharp spectral gap bound under a curvature-dimension condition

M Fathi, I Gentil, J Serres - arXiv preprint arXiv:2202.03769, 2022 - arxiv.org
We study stability of the sharp spectral gap bounds for metric-measure spaces satisfying a
curvature bound. Our main result, new even in the smooth setting, is a sharp quantitative …

Distribution-valued Ricci bounds for metric measure spaces, singular time changes, and gradient estimates for Neumann heat flows

KT Sturm - Geometric and Functional Analysis, 2020 - Springer
We will study metric measure spaces (X, d, m)(X, d, m) beyond the scope of spaces with
synthetic lower Ricci bounds. In particular, we introduce distribution-valued lower Ricci …

Monotonicity formulas for parabolic free boundary problems on cones

CK Chan, H Zhang, X Zhu - Acta Mathematica Scientia, 2022 - Springer
MONOTONICITY FORMULAS FOR PARABOLIC FREE BOUNDARY PROBLEMS ON
CONES∗ Page 1 Acta Mathematica Scientia, 2022, 42B(6): 2193–2203 https://doi.org/10.1007/s10473-022-0601-2 …