%0 Journal Article %T On the Comultiplication in Quantum Affine Algebras %A Jesper Thoren %J Mathematics %D 1999 %I arXiv %X We express the comultiplication of the generators in Drinfelds second realization of the quantum affine algebra U_q(sl_2^), induced by the comultiplication of the generators in the Drinfeld-Jimbo realization of U_q(sl_2^) in terms of generating functions. Then we find explicit expressions for the comultiplication of the generators. %U http://arxiv.org/abs/math/9901061v1