In ref. [1],Fisher studied the Hopf-Jacobson radical for Hopf module algebras, in which,when k is a field, it is required that the Hopf algebra H is irreducible as a coalgebra;that is, H contains a unique simple subco...In ref. [1],Fisher studied the Hopf-Jacobson radical for Hopf module algebras, in which,when k is a field, it is required that the Hopf algebra H is irreducible as a coalgebra;that is, H contains a unique simple subcoalgebra k. In this note, we discuss the Hopf-展开更多
文摘In ref. [1],Fisher studied the Hopf-Jacobson radical for Hopf module algebras, in which,when k is a field, it is required that the Hopf algebra H is irreducible as a coalgebra;that is, H contains a unique simple subcoalgebra k. In this note, we discuss the Hopf-
