Hall algebras and quantum groups.
Hall algebras, hereditary algebras and quantum groups.
Hopf Galois structures on Kummer extensions of prime power degree.
Hopf structure and the Kummer theory of formal groups.
Hopf-Galois extensions for monoidal Hom-Hopf algebras
Hopf-Galois extensions for monoidal Hom-Hopf algebras are investigated. As the main result, Schneider's affineness theorem in the case of monoidal Hom-Hopf algebras is shown in terms of total integrals and Hopf-Galois extensions. In addition, we obtain an affineness criterion for relative Hom-Hopf modules which is associated with faithfully flat Hopf-Galois extensions of monoidal Hom-Hopf algebras.