GAGA theorems

E883480

The GAGA theorems are foundational results in algebraic geometry that rigorously relate complex algebraic varieties to their associated analytic spaces, showing an equivalence between algebraic and analytic categories under suitable conditions.

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GAGA theorems canonical 1

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Predicate Object
instanceOf result in algebraic geometry
theorem family
acronymFor Géométrie Algébrique et Géométrie Analytique NERFINISHED
appliesTo complex projective varieties
proper schemes over the complex numbers
assumes proper morphisms over the complex numbers
author Jean-Pierre Serre NERFINISHED
baseField complex numbers
centralConcept analytification functor
coherent algebraic sheaf
coherent analytic sheaf
projective morphism
proper morphism
concerns projective varieties over the complex numbers
context comparison between algebraic and analytic categories
establishes equivalence between algebraic and analytic categories under suitable conditions
field algebraic geometry
complex analytic geometry
generalizationOf Chow’s theorem on algebraicity of analytic subvarieties of projective space NERFINISHED
hasConsequence algebraicity of analytic subvarieties of projective space
comparison between algebraic and analytic Picard groups for projective complex varieties
comparison between algebraic and analytic divisor class groups for projective complex varieties
equivalence of algebraic and analytic line bundles on projective complex varieties
hasVariant GAGA for schemes
formal GAGA theorems
relative GAGA theorems
implies algebraicity of analytic morphisms between projective complex varieties
equivalence of coherent algebraic sheaves and coherent analytic sheaves on proper complex varieties
full faithfulness of analytification functor for morphisms of projective complex varieties
isomorphism between algebraic and analytic cohomology of coherent sheaves on proper complex varieties
influenced comparison results in p-adic geometry
development of modern scheme theory
non-archimedean analytic geometry
inspired later comparison theorems between algebraic and analytic geometry
language French
publicationYear 1956
publishedIn Annales de l’Institut Fourier NERFINISHED
relates complex algebraic varieties
complex analytic spaces
requires Noetherian hypotheses on the algebraic side
finiteness of cohomology for coherent sheaves on proper varieties
statedIn Géométrie Algébrique et Géométrie Analytique NERFINISHED
status foundational result in the comparison of algebraic and analytic geometry
uses coherent sheaf theory
projective embeddings
properness in algebraic geometry
sheaf cohomology

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