Yetter-Drinfeld modules over bosonizations of dually paired Hopf   algebras
  Let $(R^{\vee},R)$ be a dual pair of Hopf algebras in the category of Yetter-Drinfeld modules over a Hopf algebra $H$ with bijective antipode. We show that there is a braided monoidal isomorphism between rational left Yetter-Drinfeld modules over the bosonizations of $R$ and of $R^{\vee}$, respectively. As an application of this very general category isomorphism we obtain a natural proof of the existence of reflections of Nichols algebras of semisimple Yetter-Drinfeld modules over $H$.   Key words: Hopf algebras, quantum groups, Weyl groupoid 
I. Heckenberger, H.-J. Schneider
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