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math.DG2021
Lorentz Ricci solitons of 4-dimensional non-Abelian nilpotent Lie groups
Rohollah Bakhshandeh-Chamazkoti
The goal of this paper is to investigate which one of thenon-isometric left invariant Lorentz metrics on 4-dimensional nilpotent Lie groups and satisfy…
math.DG2021★ 1 cited
On the invariance properties of Vaidya-Bonner geodesics via symmetry operators
Davood Farrokhi, Rohollah Bakhshandeh-Chamazkoti, Mehdi Nadjafikhah
In the present paper, we try to investigate the Noether symmetries and Lie point symmetries of the Vaidya-Bonner geodesics. Classification of one-dimensional subalgebras of Lie poi…