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Affine BPS algebras, W algebras, and the cohomological Hall algebra of mathbb{A}²

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arxiv 2209.05971 v6 pith:UTZ5FBDO submitted 2022-09-13 math.RT hep-thmath.AG

Affine BPS algebras, W algebras, and the cohomological Hall algebra of mathbb{A}²

classification math.RT hep-thmath.AG
keywords algebramathbbalgebrascohomologicalhallactedaffineaffinizations
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We introduce affinizations and deformations of the BPS Lie algebra associated to a tripled quiver with potential, and use them to precisely determine the $T$-equivariant cohomological Hall algebra $\mathcal{H}_{\mathbb{A}^2}^T$ of compactly supported coherent sheaves on $\mathbb{A}^2$, acted on by a torus $T$. In particular we show that this algebra is spherically generated for all $T$.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. The loop-nilpotent cohomological Hall algebra

    math.RT 2026-07 conditional novelty 7.0

    Loop-nilpotent CoHAs of tripled quivers are isomorphic to an explicit integral shuffle algebra, yielding generators, Coulomb-branch surjections, BPS characterizations, and a new Kac-polynomial formula.

  2. Cohomological Hall algebras of one-dimensional sheaves on surfaces and Yangians

    math.AG 2026-03 conditional novelty 7.0

    The cohomological Hall algebra of curve-supported coherent sheaves on a Kleinian resolution is isomorphic to the completed positive half of the affine Yangian of the corresponding affine ADE Lie algebra.

  3. Hall induction for cotangent representations and wheel conditions

    math.RT 2025-12 conditional novelty 6.0

    For cotangent representations of reductive groups with a suitable torus, Borel-Moore homology of the zero fiber is torsion free and the K-theoretic restriction satisfies wheel-type ideal divisibility conditions.