Cuadrados especiales en la categoría de álgebras de Lie.
Stochastica, Tome 6 (1982) no. 2, p. 137.

Voir la notice de l'article dans European Digital Mathematics Library

In this paper the concepts of mixed cartesian square and quasi-cocartesian square, already known in the category of groups, are adapted to the category of Lie algebras. These concepts can be used in the study of the obstructions of Lie algebra extensions in the same way that Wu has studied the obstructions of group extensions.
Classification : 18A30, 18B99, 17B55
Mots-clés : Algebra de Lie, Cuadrado, mixed Cartesian squares, quasi-co-Cartesian squares, category of Lie algebras, obstructions of Lie algebra extensions 
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     author = {Daniel Tarazona},
     title = {Cuadrados especiales en la categor{\'\i}a de \'algebras de {Lie.}},
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     pages = {137},
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Daniel Tarazona. Cuadrados especiales en la categoría de álgebras de Lie.. Stochastica, Tome 6 (1982) no. 2, p. 137. https://geodesic-test.mathdoc.fr/item/STO_1982__6_2_38858/