Stable rank-2 bundles on Calabi-Yau manifolds

In this paper, we apply the technique of chamber structures of stability polarizations to construct the full moduli space of rank-2 stable sheaves with certain Chern classes on Calabi-Yau manifolds which are anti-canonical divisor of P-1 x P-n or a double cover of P-1 x P-n. These moduli spaces axe isomorphic to projective spaces. As an application, we compute the holomorphic Casson invariants defined by Donaldson and Thomas.