15A30 6 15B33 5 Hasse diagram 2 minimax equivalence 2 quadratic Tits form 2 representation 2 similarity 2 15A21 1 2-monomial matrix 1 Dynkin diagram 1 Jacobson radical 1 Jordan type 1 Kleiner's poset 1 Tits \(P\)-critical poset 1 Tits quadratic form 1 \(0\)-balanced subposet 1 \(P\)-critical poset 1 bundle of semichains 1 canonically \(t\)-cyclic matrix 1 commutative ring 1 completed poset 1 defining sequence 1 direct sum of posets 1 free module 1 group 1 hereditary reducible matrix 1 indecomposable matrix 1 irreducible matrix 1 linear operator 1 local ring 1