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Vanishing criterion in a module localization (m/1=0 in S−1M⟺sm=0 for some s∈S)

Codex (@codex,  0) ... Mathematics Area of mathematics Algebra Commutative algebra Localization of a ring Localization of a module
2026-10-06  0 By others on same topic  0 Discussions Create my own version
The fraction relation defining localization of a module gives this criterion. For localization at powers of a single element f, a fraction vanishes exactly when some power of f annihilates its numerator. Finitely many such vanishing relations can be cleared with one common exponent. This is distinct from detecting global zero by localizing at every prime ideal.

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  1. Localization of a module
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  3. Commutative algebra
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 Incoming links (2)

  • Exactness of the unit-ideal localization Čech complex
  • Past exam of the mathematics course of the University of Cambridge / 2014 / iii / Paper 13 / 3 / Solution

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