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[Merged by Bors] - feat(Topology/Sequences): add missing instances #13460

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@urkud urkud commented Jun 2, 2024

  • Subtype of a Fréchet-Urysohn space is a Fréchet-Urysohn space;
  • Disjoint union (Sum, Sigma) of sequential spaces is a sequential space.

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@urkud urkud added awaiting-review awaiting-CI t-topology Topological spaces, uniform spaces, metric spaces, filters labels Jun 2, 2024
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bors r+

@github-actions github-actions bot added ready-to-merge This PR has been sent to bors. and removed awaiting-review labels Jun 25, 2024
mathlib-bors bot pushed a commit that referenced this pull request Jun 25, 2024
- Subtype of a Fréchet-Urysohn space is a Fréchet-Urysohn space;
- Disjoint union (`Sum`, `Sigma`) of sequential spaces is a sequential space.
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mathlib-bors bot commented Jun 25, 2024

Pull request successfully merged into master.

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@mathlib-bors mathlib-bors bot changed the title feat(Topology/Sequences): add missing instances [Merged by Bors] - feat(Topology/Sequences): add missing instances Jun 25, 2024
@mathlib-bors mathlib-bors bot closed this Jun 25, 2024
@mathlib-bors mathlib-bors bot deleted the YK-seq-quot branch June 25, 2024 15:26
kbuzzard pushed a commit that referenced this pull request Jun 26, 2024
- Subtype of a Fréchet-Urysohn space is a Fréchet-Urysohn space;
- Disjoint union (`Sum`, `Sigma`) of sequential spaces is a sequential space.
dagurtomas pushed a commit that referenced this pull request Jul 2, 2024
- Subtype of a Fréchet-Urysohn space is a Fréchet-Urysohn space;
- Disjoint union (`Sum`, `Sigma`) of sequential spaces is a sequential space.
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