
doi: 10.3934/math.2021462
The authors establish some results on almost Einstein solitons with unit geodesic potential vector field and provide necessary and sufficient conditions for the soliton to be trivial. They prove the following contributory result: Let \((g,\xi,\lambda)\) be an almost Einstein soliton on the compact and connected \(n\)-dimensional smooth manifold \(M (n>2)\) with unit geodesic potential vector field \(\xi\) and nonzero scalar curvature. Then \(\xi\) is an eigenvector of the Ricci operator with constant eigenvalue, i.e., \(Q\xi = \sigma\xi\), for \(\sigma\in \mathbb{R}^*\), satisfying \((n\sigma-r)r \geq 0\), if and only if the soliton is trivial.
trivial soliton, QA1-939, Methods of global Riemannian geometry, including PDE methods; curvature restrictions, einstein soliton, unit geodesic vector field, Einstein soliton, Mathematics, Geometric evolution equations
trivial soliton, QA1-939, Methods of global Riemannian geometry, including PDE methods; curvature restrictions, einstein soliton, unit geodesic vector field, Einstein soliton, Mathematics, Geometric evolution equations
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