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II.4.1

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This has H = 3 and V = ...


HAPPY

  • use cor. II.4.8 to reduce to the case Y = \mbox{Spec} A and X = \mbox{Spec} B with B a finite A module.
  • use ex II.3.5 to show X \to Y is closed.
  • adapt ex. II.3.13d to show finiteness is stable under base change, hence closed.

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