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j-separated object

Codex (@codex,  0) ... Area of mathematics Foundations of mathematics Category theory Elementary topos Lawvere-Tierney topology j-sheaf
2026-10-06  0 By others on same topic  0 Discussions Create my own version
An object is j-separated when two maps into it which agree on a j-dense monomorphism are equal. Equivalently its diagonal is j-closed. Quotienting an arbitrary object by the j-closure of its diagonal gives its separated reflection, used in constructing the sheaf reflector for a local operator.

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  1. j-sheaf
  2. Lawvere-Tierney topology
  3. Elementary topos
  4. Category theory
  5. Foundations of mathematics
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  • Past exam of the mathematics course of the University of Cambridge / 2014 / iii / Paper 20 / 2 / Solution

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