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math.RT2016
Varieties for modules of finite dimensional Hopf algebras
Sarah Witherspoon
We survey variety theory for modules of finite dimensional Hopf algebras, recalling some definitions and basic properties of support and rank varieties where they are known. We foc…
math.RT2016
Hopf automorphisms and twisted extensions
Susan Montgomery, Maria D. Vega, Sarah Witherspoon
We give some applications of a Hopf algebra constructed from a group acting on another Hopf algebra A as Hopf automorphisms, namely Molnar's smash coproduct Hopf algebra. We find c…