Let be a smooth complex curve, and let be the product ruled surface . We prove a correspondence conjectured by Donaldson between finite energy –instantons over , and rank 2 holomorphic bundles over whose restrictions to are stable.
Brendan Owens. "Instantons on cylindrical manifolds and stable bundles." Geom. Topol. 5 (2) 761 - 797, 2001. https://doi.org/10.2140/gt.2001.5.761