Tuesday, 9 September 2008

hopf algebras - Action of Co-quasi-triangular Universal r-form on aotimes1

Like David said, the proof is almost identical to the earlier one for R-matrices:



r(xotimes1)=rcirc(idotimesmu)(xotimes1otimes1)=(r13astr12)(xotimes1otimes1)=sumr(xotimes1)r(xotimes1)=(rastr)(xotimes1).



Since r is invertible, r(xotimes1)=epsilon(x).

No comments:

Post a Comment