A bigraded version of the Weil algebra and of the Weil homomorphism for Donaldson invariants
arXiv:hep-th/9402063 · doi:10.1016/0393-0440(95)00019-4
Abstract
We describe a bigraded generalization of the Weil algebra, of its basis and of the characteristic homomorphism which besides ordinary characteristic classes also maps on Donaldson invariants.
19 pages