Abstract
We introduce a new Floer theory associated to a pair consisting of a Cartan hypercontact 3–manifold M and a hyperkahler manifold X. The theory is a based on the gradient flow of the hypersymplectic action functional on the space of maps from M to X. The gradient flow lines satisfy a nonlinear analogue of the Dirac equation. We work out the details of the analysis and compute the Floer homology groups in the case where X is flat. As a corollary we derive an existence theorem for the 3–dimensional perturbed nonlinear Dirac equation.
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