arXiv subjects
Publications and source records attributed to Oscar Finegan.
We provide a novel proof of the homological excess intersection formula for local complete intersections. The novelty is that the proof makes use of global morphisms comparing the intersections to a self intersection.
In this paper we produce the first known formula for cohomologies of the derived tensor products of structure sheaves of subschemes in the case where the intersection of the subschemes is not a local complete intersection. The case covered here is where the intersection instead consists of two local complete intersection components, one of codimension 1 and the other of arbitrary codimension.