Quantum D-module conjecture for primitive extremal transitions

Let XX and YY be smooth projective varieties related by a primitive extremal transition. Denote by H(X)\mathcal{H}(X) the ambient part of the quantum DD-module of XX. After analytic continuation of H(X)\mathcal{H}(X) over the extended Kähler moduli, write the resulting DD-module as Hˉ(X)\bar{\mathcal{H}}(X). Then there are a divisor EE and a submodule HˉE(X)Hˉ(X)\bar{\mathcal{H}}^E(X)\subseteq\bar{\mathcal{H}}(X) with maximum trivial EE-monodromy such that

HˉE(X)EH(Y),\bar{\mathcal{H}}^E(X)|_E\simeq\mathcal{H}(Y),

where HˉE(X)E\bar{\mathcal{H}}^E(X)|_E denotes the restriction to EE. This conjecture proposes a relationship between the ambient quantum DD-modules of the two varieties across a primitive extremal transition, generalizing the proposed comparison for cubic extremal transitions; the statement concerns analytic continuation and restriction rather than equivalence of the full Gromov–Witten theories.

Sources & referencesView supporting material

Primary source

Rongxiao Mi, “Gromov-Witten theory under degree-4 Type II Extremal Transitions”, arXiv:1810.05783 (2018).

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