Projection formula

In algebraic geometry, the projection formula states the following: For a morphism of ringed spaces, an -module and a locally free -module of finite rank, the natural maps of sheaves are isomorphisms. There is yet another projection formula in the setting of étale cohomology.

Projection formula

In algebraic geometry, the projection formula states the following: For a morphism of ringed spaces, an -module and a locally free -module of finite rank, the natural maps of sheaves are isomorphisms. There is yet another projection formula in the setting of étale cohomology.