An equivalence between harmonic sections and sections that are harmonic maps

Details An equivalence between harmonic sections and sections that are harmonic maps An equivalence between harmonic sections and sections that are harmonic maps

2009-12-11

arxiv.org/abs/0912.2230v1

Mathematics

Differential Geometry

14 pages

Scientific paper

Let $\pi:(E,\nabla^{E}) \to (M,g)$ be an affine submersion with horizontal distribution, where $\nabla^{E}$ is a symmetric connection and $M$ is a Riemannian manifold. Let $\sigma$ be a section of $\pi$, namely, $\pi \circ \sigma = Id_{M}$. It is possible to study the harmonic property of section $\sigma$ in two ways. First, we see $\sigma$ as a harmonic map. Second, we see $\sigma$ as harmonic section. In the Riemannian context, it means that $\sigma$ is a critical point of the vertical functional energy. Our main goal is to find conditions to the assertion: $\sigma$ is a harmonic map if and only if $\sigma$ is a harmonic section.

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