Moduli spaces of framed instanton bundles on CP^3 and twistor sections of moduli spaces of instantons on C^2
arXiv:1006.0440
Abstract
We show that the moduli space of holomorphic vector bundles on that are trivial along a line is isomorphic (as a complex manifold) to a subvariety in the moduli of rational curves of the twistor space of the moduli space of framed instantons on , called the space of twistor sections. We then use this characterization to prove that is equipped with a torsion-free affine connection with holonomy in $Sp(2n,\C)$.
v. 3.0, 15 pages, many small corrections, thanks to the referee