Gradient Ricci solitons admitting a closed conformal Vector field

被引:9
|
作者
Diogenes, R. [1 ]
Ribeiro, E., Jr. [2 ]
Silva Filho, J. [1 ]
机构
[1] Univ Integracao Int Lusofonia Afro Brasileira UNI, Inst Ciencias Exatas & Nat, BR-62785000 Acarape, CE, Brazil
[2] Univ Fed Ceara, Dept Matemat, Campus Pici,Ave Humberto Monte,Bloco 914, BR-60455760 Fortaleza, CE, Brazil
关键词
Ricci soliton; Ricci flow; Conformal vector field; RIEMANNIAN SPACES;
D O I
10.1016/j.jmaa.2017.06.071
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
We prove that a gradient Ricci soliton (M-n, g) admitting a nonparallel closed conformal vector field must be locally conformally flat, provided that the dimension is 3 or 4. Moreover, in the dimension n >= 5, we show that a gradient Ricci soliton admitting a nonparallel closed conformal vector field must have harmonic Weyl tensor. In particular, we conclude that a gradient shrinking Ricci soliton admitting a nonparallel closed conformal vector field must be rigid. (C) 2017 Elsevier Inc. All rights reserved.
引用
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页码:1975 / 1983
页数:9
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