Abstract
In the Ringel–Hall algebra of Dynkin type, the set of all commutator relations between the isoclasses of indecomposable representations forms a minimal Gröbner–Shirshov basis and the set of the corresponding irreducible elements forms a PBW-type basis of the Ringel–Hall algebra. We aim to generalize this result to the reduced Drinfeld double Hall algebra of type [Formula: see text]. First, we compute a minimal Gröbner–Shirshov basis for the reduced Drinfeld double Hall algebra of type [Formula: see text] by proving that all possible compositions between the commutator relations are trivial. Then, by taking the corresponding irreducible monomials, we construct a PBW-type basis for the reduced Drinfeld double Hall algebra of type [Formula: see text].
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