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math.QA2008
The categorified Diassociative cooperad
Frédéric Chapoton
Using representations of quivers of type A, we define an anticyclic cooperad in the category of triangulated categories, which is a categorification of the linear dual of the Diass…
math.QA2008★ 6 cited
A rooted-trees q-series lifting a one-parameter family of Lie idempotents
Frédéric Chapoton
We define and study a series indexed by rooted trees and with coefficients in Q(q). We show that it is related to a family of Lie idempotents. We prove that this series is a q-defo…