Geodesic
Covariants and the No-Name Lemma
Journal of Lie theory, Tome 18 (2008) no. 4, pp. 839-849.

Voir la notice de l'article provenant de la source Heldermann Verlag

A close connection between the no-name lemma (concerning algebraic groups acting on vector bundles) and the existence of sufficiently many independent rational covariants is pointed out. In particular, this leads to a new natural proof of the no-name lemma. For linearly reductive groups, the approach has a refined variant based on integral covariants. This yields a version of the no-name lemma that has a constructive nature.
Classification : 13A50, 14L30, 14E08
Mots-clés : Rationality of fields of invariants, covariants, linearly reductive groups, Speiser's lemma 
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     author = {M. Domokos },
     title = {Covariants and the {No-Name} {Lemma}},
     journal = {Journal of Lie theory},
     pages = {839--849},
     publisher = {mathdoc},
     volume = {18},
     number = {4},
     year = {2008},
     url = {http://geodesic.mathdoc.fr/item/JLT_2008_18_4_JLT_2008_18_4_a5/}
}
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M. Domokos . Covariants and the No-Name Lemma. Journal of Lie theory, Tome 18 (2008) no. 4, pp. 839-849. http://geodesic.mathdoc.fr/item/JLT_2008_18_4_JLT_2008_18_4_a5/