Scrabble?! SERRED

Definitions of SERRED in various dictionaries:

In algebraic geometry, a branch of mathematics, Serre duality is a duality present on non-singular projective algebraic varieties V of dimension n (and in greater generality for vector bundles and further, for coherent sheaves). It shows that a cohomology group Hi is the dual space of another one, Hn−i. In the case for holomorphic vector bundle E over a smooth compact complex manifold V, the statement is in the form: H q ( V , E ) ≅ H n − q ( V , K ⊗ E ∗ ) ∗ , {\displaystyle H^{q}(V,E)\cong H^{n-q}(V,K\otimes E^{\ast })^{\ast },} in which V is not necessarily projective.