2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/164226Let $G$ be a reflection group acting on a vector space $V$ and let $γ$ be an automorphism of $V$ normalising $G$. We study how $γ$ acts on invariants and covariants (for various representations) of $G$, and properties of its eigenspaces.29 pages, 1 tableGroup Theory20F55text