Geodesic
Deformations of simple Lie algebras
Izvestiya. Mathematics , Tome 5 (1971) no. 5, pp. 1120-1126

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If we consider deformations of a Lie algebra over an arbitrary scheme, many simple Lie algebras of characteristic $p$ have deformations. It is shown that when $p>3$ the semisimple Lie algebras without deformations are the Lie algebras of classical type. 
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     author = {A. N. Rudakov},
     title = {Deformations of simple {Lie} algebras},
     journal = {Izvestiya. Mathematics },
     pages = {1120--1126},
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     volume = {5},
     number = {5},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1971_5_5_a7/}
}
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A. N. Rudakov. Deformations of simple Lie algebras. Izvestiya. Mathematics , Tome 5 (1971) no. 5, pp. 1120-1126. http://geodesic.mathdoc.fr/item/IM2_1971_5_5_a7/