Geodesic
Ricci solitons on Lorentzian four-dimensional generalized symmetric spaces
Žurnal matematičeskoj fiziki, analiza, geometrii, Tome 14 (2018) no. 2, pp. 132-140 Cet article a éte moissonné depuis la source Math-Net.Ru

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The existence of non-trivial, i.e., non-Einstein, Ricci solitons on four-dimensional Lorentzian generalized symmetric spaces is proved. Moreover, it is shown that only steady Ricci solitons can be gradient. 
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Amel Bouharis; Bachir Djebbar. Ricci solitons on Lorentzian four-dimensional generalized symmetric spaces. Žurnal matematičeskoj fiziki, analiza, geometrii, Tome 14 (2018) no. 2, pp. 132-140. http://geodesic.mathdoc.fr/item/JMAG_2018_14_2_a1/

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