Preprint

Inserted: 26 sep 2024
Last Updated: 26 sep 2024

Year: 2024

We prove that if the shape of the metric unit ball in a homogeneous group enjoys a precise symmetry property, then the associated distance yields the standard form of the area formula. The result applies to some classes of smooth and nonsmooth submanifolds. We finally prove the equality between spherical measure and centered Hausdorff measure, under two different geometric conditions on the shape of the metric unit ball.

Keywords: Hausdorff measure, area formula, isometry, symmetry, spherical measure, homogeneous group, homogeneous distance, spherical factor, Federer density, multiradial distance