Timeline for How to recognize a Hopf algebra?
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| Mar 8, 2012 at 19:01 | comment | added | Mariano Suárez-Álvarez | Commutativity of the Yoneda algebra cannot tell a non-Hopf bialgebra (or even a quasi-Hopf algebra) from a Hopf algebra, though. | |
| Mar 8, 2012 at 17:54 | comment | added | MTS | Nice observation! This works for the exterior algebra: since $\Lambda(V)$ is Koszul, the Yoneda algebra is the Koszul dual, which is of course the symmetric algebra $S(V^*)$. | |
| Mar 8, 2012 at 9:12 | history | answered | M T | CC BY-SA 3.0 |