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For questions on modules over rings.

1 vote

Action is determined by a braiding

I recomend you the book by Lambe and Radford "Introduction to the Quantum Yang-Baxter equation and Quantum Groups - An Algebraic Aproach". I think you will find a good material related to your questio …
Marco Farinati's user avatar
5 votes

When does the forgetful functor from modules to vector spaces have a right adjoint?

Hom is right adjoint to tensor product. Have you tried to write the forgetfull functor as $F(M)=R\otimes_R M$? I didn't check the details, but I think you can do something like $$Hom_k(Forget(M),W)= …
Marco Farinati's user avatar
5 votes
2 answers
507 views

A question with simple and indecomposable modules

Assume $M$ is both noetherian and artinian and fix $S_0\subseteq M$ a simple submodule. How to prove that $S_0$ is contained in some indecomposable direct summand of $M$?
Marco Farinati's user avatar