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The moduli space of $G$-monopoles of topological charge $\\alpha$ (see e.g. [Jarvis]) is naturally identified with the space $M_b(X,\\alpha)$ of based maps from $(C,\\infty)$ to $(X,B)$ of degree $\\alpha$. The moduli space of $G$-monopoles carries a natural hyperk\\\"ahler structure, and hence a holomorphic symplectic structure. We propose a simple explicit formula for the symplectic structure on $M_b(X,\\alpha)$. 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Let $X=G/B$ be the flag manifold of $G$. Let $C=P^1\\ni\\infty$ be the projective line. Let $\\alpha\\in H_2(X,{\\Bbb Z})$. The moduli space of $G$-monopoles of topological charge $\\alpha$ (see e.g. [Jarvis]) is naturally identified with the space $M_b(X,\\alpha)$ of based maps from $(C,\\infty)$ to $(X,B)$ of degree $\\alpha$. The moduli space of $G$-monopoles carries a natural hyperk\\\"ahler structure, and hence a holomorphic symplectic structure. We propose a simple explicit formula for the symplectic structure on $M_b(X,\\alpha)$. 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