The GW effective-algorithm conjecture for quintic threefolds

Let Ng,dN_{g,d} be the genus gg, degree dd Gromov–Witten invariant of the quintic threefold, and let Θg,k\Theta_{g,k} be the genus gg FJRW invariant of the Fermat quintic with kk many 25\frac{2}{5}-insertions. Let d0d_0 and dd_\infty be positive integers, and let the relations be those obtained from the localization vanishing.

GW effective-algorithm conjecture. By choosing d0d_0 and dd_\infty positive, these relations provide an effective algorithm to determine all genus GW invariants Ng,dN_{g,d}, provided that

Ng,d are known for g<g, dd,N_{g',d'}\text{ are known for }g'<g,\ d'\leq d,

and

Θg,k are known for gg, k<7g2.\Theta_{g',k'}\text{ are known for }g'\leq g,\ k'<7g-2.

This strengthens the preceding effective algorithm by asserting that suitable positive choices of the two degrees remove the need for same-genus lower-degree GW initial values.

Sources & referencesView supporting material

Primary source

Huai-Liang Chang, Jun Li, Wei-Ping Li and Chiu-Chu Melissa Liu, “An effective theory of GW and FJRW invariants of quintics Calabi-Yau manifolds”, arXiv:1603.06184 (2019).

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