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arxiv: 0902.4371 · v3 · submitted 2009-02-25 · 🧮 math.AG

Curve counting theories via stable objects I. DT/PT correspondence

classification 🧮 math.AG
keywords correspondencecountinginvariantcurvepairsstabletheoriesanother
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The Donaldson-Thomas invariant is a curve counting invariant on Calabi-Yau 3-folds via ideal sheaves. Another counting invariant via stable pairs is introduced by Pandharipande and Thomas, which counts pairs of curves and divisors on them. These two theories are conjecturally equivalent via generating functions, called DT/PT correspondence. In this paper, we show the Euler characteristic version of DT/PT correspondence, using the notion of weak stability conditions and the wall-crossing formula.

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  1. The Pandharipande-Thomas rationality conjecture for superpositive curve classes on projective complex 3-manifolds

    math.AG 2026-04 unverdicted novelty 6.0

    Proves that generating functions of Pandharipande-Thomas invariants with descendent insertions are rational with controlled poles for superpositive curve classes on projective complex 3-manifolds.