Poincaré’s Lemma on Some Non-Euclidean Structures
Alexandru Kristály
Chinese Annals of Mathematics, Series B ›› 2018, Vol. 39 ›› Issue (2) : 297 -314.
Poincaré’s Lemma on Some Non-Euclidean Structures
The author proves the Poincaré lemma on some (n + 1)-dimensional corank 1 sub-Riemannian structures, formulating the $\frac{{\left( {n - 1} \right)n\left( {{n^2} + 3n - 2} \right)}}{8}$ necessarily and sufficiently “curl-vanishing” compatibility conditions. In particular, this result solves partially an open problem formulated by Calin and Chang. The proof in this paper is based on a Poincaré lemma stated on Riemannian manifolds and a suitable Cesàro-Volterra path integral formula established in local coordinates. As a byproduct, a Saint-Venant lemma is also provided on generic Riemannian manifolds. Some examples are presented on the hyperbolic space and Carnot/Heisenberg groups.
Poincaré lemma / Cesàro-Volterra path integral / Sub-Riemannian manifolds
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