15A03 1 20E34 1 20F16 1 20F29 1 20M10 1 FC-hypercentral 1 Primary 20H25; Secondary 20F29 1 Primary 20M18; Secondary 20F29 1 Vector space 1 \(G\)-invariant subspace 1 augmentation dimension 1 automorphism 1 bicyclic extension 1 bicyclic monoid 1 finite central dimension 1 finite dimensional orbit 1 finite orbit 1 group of automorphism 1 inverse semigroup 1 irreducible group 1 linear group 1 maximal condition 1 minimal condition 1 module 1 nearly \(G\)-invariant subspace 1 order isomorphism 1 order-convex set 1 quasi-irreducible group 1