... (2.9),(2.13)a∈Zdb∈Zdxayb−αaz−βbw−βa∈Zdρw, {x, y, a} γ az−βxay−α≤a∈Zdwa γ az−βxay−α+ ρw, {x, y} γ a∈Zdaz−βxay−α wzxy γ + ρw, {x, y} γ zxy γ ≤ 2wzxy γ .By symmetry, we ... zx γ a∈Zdax−αay−β zx γ xy γ ≤xyz γ ,where Lemma 2.10 was used in the next to last inequality. Combining thesetwo estimates completes the proof of the lemma.The following slight extension of Lemma ... dimS(R) and γ := α + β − d.Since Corollary 2.9 verifies (2.1) for the composition LR, it suffices to prove(2.2) for LR with γ in place of α. Independence of the relations L and R,together with (2.2)...