EQUIVARIANT HOLOMORPHIC EMBEDDINGS FROM THE COMPLEX PROJECTIVE LINE INTO COMPLEX GRASSMANNIAN OF 2-PLANES
概要
Using gauge theory, we classify SU(2)-equivariant holomorphic embeddings from CP1 with the Fubini–Study metric into Grassmann manifold GrN−2(CN). It is shown that the moduli spaces of those embeddings are identified with the gauge equivalence classes of non-flat invariant connections satisfying semi-positivity on the vector bundles given by extensions of line bundles. A topology on the moduli is obtained by means of L2-inner product on Dolbeault cohomology group to which the extension class belongs. The compactification of the moduli is provided with geometric meaning from viewpoint of maps.