Two Ideals I , J 𝐼 𝐽 I,J of a Ring R 𝑅 R are said to be comaximal if x + y = 1 𝑥 𝑦 1 x+y=1 for some x ∈ I 𝑥 𝐼 x\in I and y ∈ J 𝑦 𝐽 y\in J . In more global terms, this means that I + J = R 𝐼 𝐽 𝑅 I+J=R .