Sarah Witherspoon is telling participants at @mathmoves about what it means for a Hopf algebra to act on a ring. This generalizes the way that groups act on rings by automorphisms, and the way that Lie algebras act on rings by derivations.https://www.msri.org/workshops/906
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This is a good way to become passionately interested in the 3rd cohomology group of a cyclic group!
Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi
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