Article

The Hasse-Witt invariant of the Killing form

December 1998
Canadian Journal of Mathematics 50(6)

DOI:10.4153/CJM-1998-064-x

Authors:

Nous montrons que l’invariant de Hasse-Witt de la forme de Killing d’une algèbre de Lie semi-simple L s’exprime à l’aide de l’invariant de Tits de la représentation irréductible de L de poids dominant ρ = 1/2 (somme des racines positives), et des invariants associés au groupe des symétries du diagramme de Dynkin de L.

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