Rigidity of Complete Gradient Steady Ricci Solitons with Harmonic Weyl Curvature

Abstract

Our main aim in this paper is to investigate the rigidity of complete noncompact gradient steady Ricci solitons with harmonic Weyl tensor. More precisely, we prove that an $n$-dimensional ($n\ge 5$) complete noncompact gradient steady Ricci soliton with harmonic Weyl tensor and multiply warped product metric is either Ricci flat or isometric to the Bryant soliton up to scaling. Meanwhile, for $n\ge 5$, we provide a local structure theorem for $n$-dimensional connected (not necessarily complete) gradient Ricci solitons with harmonic Weyl curvature and multiply warped product metric.

27 pages. arXiv admin note: text overlap with arXiv:1604.02827 by other authors

References in corpus (4)

• On Bach-flat gradient shrinking Ricci solitons
• Evolution of the Weyl Tensor under the Ricci Flow
• On a classification of the gradient shrinking solitons
• Vacuum Static Spaces with Harmonic Curvature