# Equivariant Floer theory and double covers of three-manifolds.

@article{Large2019EquivariantFT, title={Equivariant Floer theory and double covers of three-manifolds.}, author={Tim Large}, journal={arXiv: Symplectic Geometry}, year={2019} }

Inspired by Kronheimer and Mrowka's approach to monopole Floer homology, we develop a model for $\mathbb{Z}/2$-equivariant symplectic Floer theory using equivariant almost complex structures, which admits a localization map to a twisted version of Floer cohomology in the invariant set. We then present applications to Steenrod operations on Lagrangian Floer cohomology, and to the Heegaard Floer homology of double covers of three-manifolds.

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