Jian Liu
Abstract
For k a commutative ring,A a k-bialgebra and D a right A-comodule k-algebra,we define a new comultiplication on the A-comodule D to obtain a “twisted coalgebra”D~τ,and give the sufficient and necessary conditions for D~τbeing a A-module coalgebra.
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For k a commutative ring,A a k-bialgebra and D a right A-comodule k-algebra,we define a new comultiplication on the A-comodule D to obtain a “twisted coalgebra”D~τ,and give the sufficient and necessary conditions for D~τbeing a A-module coalgebra.
Key concepts: Coalgebra, Bialgebra, Hopf algebra, Ring (chemistry), Commutative ring, Pure mathematics, Commutative property, Mathematics