Horizontal semiconcavity for the square of Carnot-Carathéodory distance on step 2 Carnot groups and applications to Hamilton-Jacobi equations

Dragoni, Federica ORCID: https://orcid.org/0000-0001-6076-9725, Liu, Qing and Zhang, Ye 2024. Horizontal semiconcavity for the square of Carnot-Carathéodory distance on step 2 Carnot groups and applications to Hamilton-Jacobi equations. [Online]. arXiv. Available at: https://doi.org/10.48550/arXiv.2402.19164

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Abstract

We show that the square of Carnot-Carath ́eodory distance from the origin, in step 2 Carnot groups, enjoys the horizontal semiconcavity (h-semiconcavity) everywhere in the group including the origin. We first give a proof in the case of ideal Carnot groups, based on the simple group structure as well as estimates for the Euclidean semiconcavity. Our proof of the general result involves more geometric properties of step 2 Carnot groups. We further apply our h-semiconcavity result to show h-semiconcavity of the viscosity solutions to a class of non-coercive evolutive Hamilton-Jacobi equations by using the Hopf-Lax formula associated to the Carnot-Carath ́eodory metric.

Item Type:	Website Content
Date Type:	Submission
Status:	Unpublished
Schools:	Mathematics
Subjects:	Q Science > QA Mathematics
Publisher:	arXiv
Last Modified:	13 Dec 2024 16:15
URI:	https://orca.cardiff.ac.uk/id/eprint/174419

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