I have a little question when I read an article. Someone can give me any clue? Let $\mathrm{H}$ be a Hopf algebra and $\mathrm{B}$ be a braided bialgebra in Left-left-Yetter-Drinfled-module over $\mathrm{H}$ (I don't know how to type this symbol in Latex). My question is $\mathcal{P}(\mathrm{B}^o)$(primitive space of finite dual) is a Yetter-Drinfeld-module? From the context the answer seems positive. Thank you!
It's done!
Thanks everybody!