The Comultiplication of Modified Quantum Affine n

Let U(𝔰𝔩 n) be the modified quantum affine 𝔰𝔩n and let U(𝔰𝔩 N)+ be the positive part of quantum affine 𝔰𝔩N. Let B(n) be the canonical basis of U(𝔰𝔩 n) and let B(N)ap be the canonical basis of...