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sheafExt^ZZ(CoherentSheaf,CoherentSheaf) -- sheaf Ext of coherent sheaves

Synopsis:

  • Usage: E = sheafExt^n(F,G)
  • Operator: sheafExt -- sheaf Ext of coherent sheaves
  • Input:
  • F, an instance of class ZZ.
  • G, an instance of class CoherentSheaf.
  • E, an instance of class CoherentSheaf: the n-th sheaf Ext of F and G.
  • Output:
  • E, an instance of class CoherentSheaf: the n-th sheaf Ext of F and G.
  • Code:

         -- ../m2/varieties.m2:319
         sheafExt(ZZ,CoherentSheaf,CoherentSheaf) := CoherentSheaf => (n,F,G) -> prune sheaf Ext^n(module F, module G)

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