Geodesic
Ricci solitons of four-dimensional Lorentzian Damek–Ricci spaces
Žurnal matematičeskoj fiziki, analiza, geometrii, Tome 16 (2020) no. 2, pp. 190-199 Cet article a éte moissonné depuis la source Math-Net.Ru

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In this paper, we show that the four-dimensional Lorentzian Damek–Ricci spaces are not a Ricci soliton. This is a generalization of the result of Tan and Deng (see 11) who proved that these spaces are not a Ricci soliton only with respect to the left-invariant vector fields. 
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     author = {Noura Sidhoumi},
     title = {Ricci solitons of four-dimensional {Lorentzian} {Damek{\textendash}Ricci} spaces},
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     url = {http://geodesic.mathdoc.fr/item/JMAG_2020_16_2_a5/}
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Noura Sidhoumi. Ricci solitons of four-dimensional Lorentzian Damek–Ricci spaces. Žurnal matematičeskoj fiziki, analiza, geometrii, Tome 16 (2020) no. 2, pp. 190-199. http://geodesic.mathdoc.fr/item/JMAG_2020_16_2_a5/

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