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Classification of ideals of 8 -dimensional Radford Hopf algebra

Yu Wang (2022)

Czechoslovak Mathematical Journal

Let H m , n be the m n 2 -dimensional Radford Hopf algebra over an algebraically closed field of characteristic zero. We give the classification of all ideals of 8 -dimensional Radford Hopf algebra H 2 , 2 by generators.

Classification of spherical varieties

Paolo Bravi (2010)

Les cours du CIRM

We give a short introduction to the problem of classification of spherical varieties, by presenting the Luna conjecture about the classification of wonderful varieties and illustrating some of the related currently known results.

Classification of strict wonderful varieties

Paolo Bravi, Stéphanie Cupit-Foutou (2010)

Annales de l’institut Fourier

In the setting of strict wonderful varieties we prove Luna’s conjecture, saying that wonderful varieties are classified by combinatorial objects, the so-called spherical systems. In particular, we prove that primitive strict wonderful varieties are mostly obtained from symmetric spaces, spherical nilpotent orbits and model spaces. To make the paper as self-contained as possible, we also gather some known results on these families and more generally on wonderful varieties.

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