Projection formula
In algebraic geometry, the projection formula states that,[1][2] for a quasi-compact separated morphism of schemes , a quasi-coherent sheaf on X, a locally free sheaf on Y, the natural maps of sheaves
are isomorphisms.
There is yet another projection formula in the setting of étale cohomology.
See also
References
- ↑ Hartshorne 1977, Ch III, Exercise 8.3
- ↑ http://math.stanford.edu/~vakil/0708-216/216class38.pdf
Hartshorne, Robin (1977), Algebraic Geometry, Graduate Texts in Mathematics, 52, New York: Springer-Verlag, ISBN 978-0-387-90244-9, MR 0463157
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