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arXiv · 2609.34154

Properties and Perturbations of Extremally Ricci-Pinched $G_2$-Structures

Aaron Kennon
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Abstract

We study properties of Extremally Ricci-Pinched (ERP) $G_2$-Structures on compact $7$-manifolds. We provide characterizations of the ERP condition in terms of the traceless $\ast$-Ricci tensor, the Hodge Laplacian of the torsion, the Ricci eigenvalues, the Laplacian flow, and the $27$-dimensional Weyl curvature component. We also prove that the automorphism group of a compact ERP $G_2$-Structure is finite. We then identify perturbations of ERP $G_2$-Structures, both in general and for specific examples, that preserve the ERP condition.

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BibTeXRIS

Aaron Kennon. 2026-09-28. Properties and Perturbations of Extremally Ricci-Pinched $G_2$-Structures. https://arxiv.org/abs/2609.34154

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