It is shown that if k is a field of characteristic zero, then the kernel of any w x triangular k-derivation of k X , X , X , X is finitely generated as a k-algebra. This is obtained as a corollary of a more general result concerning triangular w x R-derivations of R X, Y, Z for certain rings R.
High yield syntheses of reactive fluoride K1 − x(Y,Ln)xF1 + 2x nanoparticles
✍ Scribed by C. Sassoye; G. Patriarche; M. Mortier
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 595 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0925-3467
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