Abstract
For a Chevalley groupG over a field of characteristic 2 we determine all irreducible modulesV overGF(2) such that [V, R, Q]=0, whereR is a long root group andQ=Z 2(O 2(N G(R))). As a corollary we obtain a classification of those irreducible modules admitting a quadratic fours groupE which intersect a long root group nontrivially but is not contained in such a group.
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Stroth, G. Strong quadratic modules. Israel J. Math. 79, 257–279 (1992). https://doi.org/10.1007/BF02808219
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DOI: https://doi.org/10.1007/BF02808219