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arxiv: 2601.16092 · v2 · pith:OTITFEZDnew · submitted 2026-01-22 · 🧮 math.RT · math.CT

Monoidal adjunctions and abelian envelopes

classification 🧮 math.RT math.CT
keywords abelianenvelopesmonoidaladjunctionscategoriescombinatorialexistenceadmitting
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We show how monoidal adjunctions can be used to prove the existence of monoidal abelian envelopes of pseudo-tensor categories, in particular, those admitting a combinatorial description with certain properties. We derive concrete general criteria, which we then demonstrate by giving relatively simple combinatorial proofs of the existence of new abelian envelopes for interpolation categories of the hyperoctahedral and of the modified symmetric groups.

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