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  1. Atiyah class and sheaf counting on local Calabi-Yau 4-folds

    https://www.math.cuhk.edu.hk/seminars/atiyah-class-and-sheaf-counting-local-calabi-yau-4-folds
    ... Donaldson-Thomas (DT) invariants of torsion sheaves with 2 dimensional support on a smooth projective surface in an ambient non-compact Calabi Yau fourfold given by the total space of a rank 2 bundle on the surface. We prove that in certain cases, when the rank 2 bundle ... Poster:  pure_201022_artan_sheshmani.pdf ...