Generating series of stable pairs descendent invariants on Fano 3-folds are rational and q ↔ q^{-1} symmetric.
The GW/PT conjectures for toric pairs
2 Pith papers cite this work. Polarity classification is still indexing.
abstract
We prove the conjectural correspondence between logarithmic Gromov-Witten theory and logarithmic Donaldson/Pandharipande-Thomas theory for pairs $(Y|\partial Y)$ consisting of a toric threefold $Y$ and any torus invariant divisor $\partial Y$, with primary insertions. The results are the first verifications of this conjecture when $\partial Y$ is singular, i.e., the ``fully logarithmic'' setting, and the first proof of the equivariant toric correspondence for pairs when $\partial Y$ is nonempty. When $\partial Y$ is empty, we get a new proof of the known toric correspondence, but our methods also lead to stronger conclusions. In particular, we show the PT series is a Laurent polynomial in the presence of sufficient positivity and prove a 2008 conjecture of Oblomkov, Okounkov, Pandharipande, and the first author stating the capped vertex is a Laurent polynomial. The methods also verify the logarithmic DT/PT conjecture for toric threefold pairs. Using the constraints of the logarithmic theory, the complete evaluation of toric pairs is determined by a single calculation -- the degree $1$ series of $\mathbb{P}^3$.
fields
math.AG 2years
2026 2verdicts
UNVERDICTED 2representative citing papers
The authors introduce logarithmic coherent sheaves in the logarithmic étale topology and tools to reduce homological algebra computations to alterations, unifying logarithmic Quot spaces, Picard groups, and parabolic sheaves.
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Rationality and symmetry of stable pairs generating series of Fano 3-folds
Generating series of stable pairs descendent invariants on Fano 3-folds are rational and q ↔ q^{-1} symmetric.
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Coherent sheaves in logarithmic geometry
The authors introduce logarithmic coherent sheaves in the logarithmic étale topology and tools to reduce homological algebra computations to alterations, unifying logarithmic Quot spaces, Picard groups, and parabolic sheaves.