Geodesic
Eigen values and principal directions of the energy momentum tensor of the ferrofluid
Theoretical and applied mechanics, Tome 7 (1981) no. 1, p. 113 Cet article a éte moissonné depuis la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

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In this paper we investigate the eigen values and principal directions of the energy-momentum tensor of the ferrofluid. The model we are concerned with, was proposed and introduced by Cattaneo and Cissoko. That energy-momentum tensor is not symmetric and it is not positive that eigen values are real. We obtain four different eigen values. Two eigen values are real and corresponding principal directions are space-like. For other two eigen values we find the condition making them real. We analyze the conditions determining the type of the corresponding principal direction. 
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     author = {Dragi Radojevi\'c},
     title = {Eigen values and principal directions of the energy momentum tensor of the ferrofluid},
     journal = {Theoretical and applied mechanics},
     pages = {113 },
     year = {1981},
     volume = {7},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAM_1981_7_1_a12/}
}
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Dragi Radojević. Eigen values and principal directions of the energy momentum tensor of the ferrofluid. Theoretical and applied mechanics, Tome 7 (1981) no. 1, p. 113 . http://geodesic.mathdoc.fr/item/TAM_1981_7_1_a12/