The equality of combinatorial and geometric refined BPS invariants

For the local P2\mathbb{P}^2, let n~di,j\widetilde{n}_d^{i,j} denote the combinatorial refined BPS invariants obtained from the Nekrasov partition function, and let ndi,jn_d^{i,j} denote the refined BPS invariants defined via the perverse filtration. The refined BPS correspondence conjecture. For all relevant indices d,i,jd,i,j, one has

n~di,j=ndi,j.\widetilde{n}_d^{i,j}=n_d^{i,j}.

The equality would identify the easily computable Nekrasov invariants with the geometric invariants from the moduli-space perverse filtration. The text presents this as expected from string-theoretic considerations, and no proof or disproof is supplied.

Sources & referencesView supporting material

Primary source

Yakov Kononov, Weite Pi and Junliang Shen, “Perverse filtrations, Chern filtrations, and refined BPS invariants for local P^2”, arXiv:2211.06991 (2023).

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