Geodesic
Higher Derivations and Tensor Products of Commutative Rings
Canadian journal of mathematics, Tome 30 (1978) no. 2, pp. 401-418

Voir la notice de l'article provenant de la source Cambridge University Press

The genesis of this paper is the following well known result in field theory: Let R denote a field of characteristic p ≠ 0, and let denote a subfield of R such that for some e sufficiently large. Then R is isomorphic to the tensor product (over ) of primitive extensions of if and only if there exists a finite set Γ of -higher derivations on R such that is the field of constants of Γ. A proof of this theorem can be found in [6]. 
Brown, W. C. Higher Derivations and Tensor Products of Commutative Rings. Canadian journal of mathematics, Tome 30 (1978) no. 2, pp. 401-418. doi: 10.4153/CJM-1978-035-9
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[5] 5. Ribenboim, P., Higher derivations of rings I, Rev. Roum. Math Pures et Appl. 16 (1971), 77–110. Google Scholar

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