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Polar Coordinates in Carnot groups II (2208.04913v1)
Published 9 Aug 2022 in math.AP, math.DG, and math.MG
Abstract: A Carnot group is polarizable if it carries a homogeneous norm whose powers are fundamental solutions for the $p$-sub-Laplacian operators for all $1<p \le \infty$. Such groups also support a system of horizontal polar coordinates. We prove that the converse statement is true: if a Carnot group supports a horizontal polar coordinate system with suitable properties, then it is polarizable.
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