For the field and -vector space , let be a subgroup of , the group of invertible -linear transformations of . A subspace of is -contrainvariant if . We discuss groups and vector spaces such that every subspace of is either -invariant or -contrainvariant.
"On certain groups with $G$-contrainvariant subspaces." Rocky Mountain J. Math. 50 (6) 2023 - 2034, December 2020. https://doi.org/10.1216/rmj.2020.50.2023