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 …

New formulas for the Laplacian of distance functions and applications

F Cavalletti, A Mondino - Analysis & PDE, 2020 - msp.org
The goal of the paper is to prove an exact representation formula for the Laplacian of the
distance (and more generally for an arbitrary 1-Lipschitz function) in the framework of metric …

Sub-Riemannian interpolation inequalities

D Barilari, L Rizzi - Inventiones mathematicae, 2019 - Springer
We prove that ideal sub-Riemannian manifolds (ie, admitting no non-trivial abnormal
minimizers) support interpolation inequalities for optimal transport. A key role is played by …

Almost-Riemannian manifolds do not satisfy the curvature-dimension condition

M Magnabosco, T Rossi - Calculus of Variations and Partial Differential …, 2023 - Springer
Abstract The Lott–Sturm–Villani curvature-dimension condition CD (K, N) provides a
synthetic notion for a metric measure space to have curvature bounded from below by K and …

Sub-Laplacian comparison theorems on totally geodesic Riemannian foliations

F Baudoin, E Grong, K Kuwada, A Thalmaier - Calculus of Variations and …, 2019 - Springer
We develop a variational theory of geodesics for the canonical variation of the metric of a
totally geodesic foliation. As a consequence, we obtain comparison theorems for the …

Topological regularity of isoperimetric sets in PI spaces having a deformation property

G Antonelli, E Pasqualetto, M Pozzetta… - Proceedings of the …, 2023 - cambridge.org
We prove topological regularity results for isoperimetric sets in PI spaces having a suitable
deformation property, which prescribes a control on the increment of the perimeter of sets …

The Quasi Curvature‐Dimension Condition with Applications to Sub‐Riemannian Manifolds

E Milman - Communications on Pure and Applied Mathematics, 2021 - Wiley Online Library
We obtain the best known quantitative estimates for the L p‐Poincaré and log‐Sobolev
inequalities on domains in various sub‐Riemannian manifolds, including ideal Carnot …

On the cut locus of free, step two Carnot groups

L Rizzi, U Serres - Proceedings of the American Mathematical Society, 2017 - ams.org
In this note, we study the cut locus of the free, step two Carnot groups $\mathbb {G} _k $ with
$ k $ generators, equipped with their left-invariant Carnot-Carathéodory metric. In particular …

Failure of the curvature-dimension condition in sub-Finsler manifolds

M Magnabosco, T Rossi - arXiv preprint arXiv:2307.01820, 2023 - arxiv.org
The Lott-Sturm-Villani curvature-dimension condition $\mathsf {CD}(K, N) $ provides a
synthetic notion for a metric measure space to have curvature bounded from below by $ K …

Rank 5 Trivializable Subriemannian Structure on and Subelliptic Heat Kernel

W Bauer, A Laaroussi, D Tarama - Potential Analysis, 2024 - Springer
We present an explicit form of the subelliptic heat kernel of the intrinsic sublaplacian Δ sub 5
induced by a rank 5 trivializable subriemannian structure on the Euclidean seven …