Constructing categorical idempotents
arXiv:2002.08905
Abstract
We give a general construction of categorical idempotents which recovers the categorified Jones-Wenzl projectors, categorified Young symmetrizers, and other constructions as special cases. The construction is intimately tied to cell theory in the sense of additive monoidal categories.
25 pages; v2 fixes typos and some missing figures
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