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Grothendieck spectral sequence : ウィキペディア英語版 | Grothendieck spectral sequence In mathematics, in the field of homological algebra, the Grothendieck spectral sequence, introduced in ''Tôhoku paper'', is a spectral sequence that computes the derived functors of the composition of two functors , from knowledge of the derived functors of ''F'' and ''G''. If and are two additive and left exact functors between abelian categories such that takes ''F''-acyclic objects (e.g., injective objects) to -acyclic objects and if has enough injectives, then there is a spectral sequence for each object of that admits an ''F''-acyclic resolution: : Many spectral sequences in algebraic geometry are instances of the Grothendieck spectral sequence, for example the Leray spectral sequence. The exact sequence of low degrees reads :0 → ''R''1''G''(''FA'') → ''R''1(''GF'')(''A'') → ''G''(''R''1''F''(''A'')) → ''R''2''G''(''FA'') → ''R''2(''GF'')(''A''). == Examples ==
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