Codimension 2

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(Cech cohomology and the Hodge conjecture in codim 1)
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= Cech cohomology and the Hodge conjecture in codim 1 =
 
= Cech cohomology and the Hodge conjecture in codim 1 =
  
Definition of vector bundles by Cech cocycles - Weibel<ref name="Wei13"/>, p. 54 ff. I.5.10
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* Classification of vector bundles by Cech-cocycles, Theorem I.5.10<ref name="Wei13"/>. Mention also that for a ''projective'' complex algebraic variety <math>X</math>, complex analytic vector bundles, classified by <math>H^1(X^{an}, \mathcal{O}_X^{an})</math> (analytic Cech cohomology), are the same as algebraic vector bundles on <math>X</math>, classified by <math>H^1(X, \mathcal{O}_X)</math> (Zariski Cech cohomology).
 
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* Classification of vector bundles by Cech-cocycles, Theorem 5.10<ref name="Wei13"/>. Mention also that for a ''projective'' complex algebraic variety <math>X</math>, complex analytic vector bundles, classified by <math>H^1(X^{an}, \mathcal{O}_X^{an})</math> (analytic Cech cohomology), are the same as algebraic vector bundles on <math>X</math>, classified by <math>H^1(X, \mathcal{O}_X)</math> (Zariski Cech cohomology).
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* Need also Lemma 2.1<ref name="Blo74"/> on a non-Abelian version of the long exact sequence.
 
* Need also Lemma 2.1<ref name="Blo74"/> on a non-Abelian version of the long exact sequence.
  

Revision as of 17:34, 5 April 2016

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