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Integral Cohomology and Mirror Symmetry for Calabi-Yau 3-folds

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abstract

In this paper, we compute the integral cohomology groups for all examples of Calabi-Yau 3-folds obtained from hypersurfaces in 4-dimensional Gorenstein toric Fano varieties. Among 473 800 776 families of Calabi-Yau 3-folds $X$ corresponding to 4-dimensional reflexive polytopes there exist exactly 32 families having non-trivial torsion in $H^*(X, \Z)$. We came to an interesting observation that the torsion subgroups in $H^2$ and $H^3$ are exchanged by the mirror symmetry involution, i.e. the torsion subgroup in the Picard group of $X$ is isomorphic to the Brauer group of the mirror $X^*$

fields

hep-th 1

years

2026 1

verdicts

UNVERDICTED 1

representative citing papers

Exploring Line Bundle Standard Models with Transformers

hep-th · 2026-06-30 · unverdicted · novelty 7.0

A Transformer RL agent is trained to generate valid heterotic line bundle sums on CICYs that satisfy gauge embedding, anomaly cancellation, poly-stability, chirality, and no-exotics constraints.

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  • Exploring Line Bundle Standard Models with Transformers hep-th · 2026-06-30 · unverdicted · none · ref 80 · internal anchor

    A Transformer RL agent is trained to generate valid heterotic line bundle sums on CICYs that satisfy gauge embedding, anomaly cancellation, poly-stability, chirality, and no-exotics constraints.