Artan Sheshmani

Counting curves on surfaces in Calabi–Yau 3-folds

Motivated by S-duality modularity conjectures in string theory, we define new invariants counting a restricted class of two-dimensional torsion sheaves, enumerating pairs

Equivariant Gromov-Witten Invariants of Algebraic GKM Manifolds

Z\subset H

Donaldson–Thomas invariants of 2-dimensional sheaves inside threefolds and modular forms

Z⊂H in a Calabi–Yau threefold

Generalized Donaldson–Thomas invariants of

X

-dimensional sheaves on local

X. Here