Pointedness conjecture for non-semisimple Hopf algebras of dimension pq2pq^2

Let k\Bbbk be an algebraically closed field of characteristic zero. Let pp and qq be distinct primes, and let HH be a non-semisimple Hopf algebra over k\Bbbk of dimension pq2pq^2. Write HH^* for its dual Hopf algebra, and call a Hopf algebra pointed when all its simple comodules are one-dimensional.

Pointedness conjecture. The Hopf algebra HH or its dual HH^* is pointed.

This conjecture is motivated by the classification results for non-semisimple Hopf algebras of dimension 4p4p, including the cases p11p\leq 11, together with related results cited in the source. The general assertion for dimension pq2pq^2 remains open in the supplied text.

Sources & referencesView supporting material

Primary source

Yi-Lin Cheng and Siu-Hung Ng, “On Hopf algebras of dimension 4p”, arXiv:1005.1267 (2010).

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