Projection formula

In algebraic geometry, the projection formula states the following:[1][2]

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.

See also

References

Hartshorne, Robin (1977), Algebraic Geometry, Graduate Texts in Mathematics, vol. 52, New York: Springer-Verlag, ISBN 978-0-387-90244-9, MR 0463157


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.