Fredholm-Regularity of Holomorphic Discs in Plane Bundles over Compact Surfaces

Abstract

We study the space of holomorphic discs with boundary on a surface in a real 2-dimensional vector bundle over a compact 2-manifold. We prove that, if the ambient 4-manifold admits a fibre-preserving transitive holomorphic action, then a section with a single complex point has $C^{2,\alpha }$-close sections such that any (non-multiply covered) holomorphic disc with boundary in these sections are Fredholm regular. Fredholm regularity is also established when the complex surface is neutral Kähler, the action is both holomorphic and symplectic, and the section is Lagrangian with a single complex point.

9 pages LaTEX, to appear in Ann. Fac. Sci. Toulouse Math. Essentially a revised version of Section 2.2 of the Proof of the Caratheodory Conjecture by the same authors posted at arXiv: arXiv:0808.0851

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