Ricci soliton;
contact metric structure;
K-contact;
Einstein Sasakian;
infinitesimal automorphism;
D O I:
10.1007/s00022-021-00615-1
中图分类号:
O1 [数学];
学科分类号:
0701 ;
070101 ;
摘要:
We improve the previous result "A complete Ricci soliton whose metric g is K-contact and the soliton vector field X is strictly contact, is compact Sasakian Einstein" and show that, if a complete Ricci soliton (M, g, X) whose metric g is a contact metric and the soliton vector field X is strictly contact, then X is an infinitesimal automorphism and g is Einstein. Finally, for a Ricci soliton with X as the Reeb vector field, we show that (M, g) is compact Einstein and and Sasakian.