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[Merged by Bors] - feat(CategoryTheory): accessible functors and presentable objects#19937

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[Merged by Bors] - feat(CategoryTheory): accessible functors and presentable objects#19937
joelriou wants to merge 51 commits intomasterfrom
category-theory-accessible

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@joelriou joelriou commented Dec 13, 2024 •
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This PR introduces the notions of accessible functors and of presentable objects. An object X in a category is κ-presentable (for κ a regular cardinal) if the functor Hom(X, -) commutes with colimits indexed by κ-filtered categories.

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@joelriou joelriou added WIP Work in progress t-category-theory Category theory labels Dec 13, 2024
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github-actions bot commented Dec 13, 2024 •
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PR summary a0b651639a

Import changes for modified files

No significant changes to the import graph

Import changes for all files
Files Import difference
Mathlib.CategoryTheory.Presentable.Basic (new file) 770

Declarations diff

+ HasCardinalFilteredColimits
+ IsCardinalAccessible
+ IsCardinalPresentable
+ instance [HasColimitsOfSize.{w, w} C] : HasCardinalFilteredColimits.{w} C κ
+ isCardinalAccessible_of_le
+ isCardinalAccessible_of_natIso
+ isCardinalPresentable_of_iso
+ isCardinalPresentable_of_le
+ of_equivalence
+ preservesColimitsOfShape_of_isCardinalAccessible
+ preservesColimitsOfShape_of_isCardinalAccessible_of_essentiallySmall
+ preservesColimitsOfShape_of_isCardinalPresentable
+ preservesColimitsOfShape_of_isCardinalPresentable_of_essentiallySmall

You can run this locally as follows 
## summary with just the declaration names:
./scripts/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/declarations_diff.sh long <optional_commit>

The doc-module for script/declarations_diff.sh contains some details about this script.

No changes to technical debt.

You can run this locally as

./scripts/technical-debt-metrics.sh pr_summary
  • The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
  • The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).

@mathlib4-dependent-issues-bot mathlib4-dependent-issues-bot added the blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) label Dec 13, 2024
@joelriou joelriou mentioned this pull request Dec 14, 2024
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@joelriou joelriou mentioned this pull request Dec 27, 2024
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@leanprover-community-bot-assistant leanprover-community-bot-assistant added the merge-conflict The PR has a merge conflict with master, and needs manual merging. (this label is managed by a bot) label Jan 13, 2025
@mathlib4-dependent-issues-bot mathlib4-dependent-issues-bot removed the blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) label Jan 23, 2025
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mathlib4-dependent-issues-bot commented Jan 23, 2025

This PR/issue depends on:

@github-actions github-actions bot removed the merge-conflict The PR has a merge conflict with master, and needs manual merging. (this label is managed by a bot) label Jan 23, 2025
@joelriou joelriou removed the WIP Work in progress label Jan 23, 2025
@joelriou joelriou changed the title feat(CategoryTheory): presentable objects feat(CategoryTheory): accessible functors and presentable objects Jan 23, 2025
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Thanks!
bors d+

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mathlib-bors bot commented Jan 25, 2025

✌️ joelriou can now approve this pull request. To approve and merge a pull request, simply reply with bors r+. More detailed instructions are available here.

@ghost ghost added the delegated This pull request has been delegated to the PR author (or occasionally another non-maintainer). label Jan 25, 2025
joelriou and others added 5 commits January 25, 2025 09:20
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Update Mathlib/CategoryTheory/Presentable/Basic.lean
8044b64 
Co-authored-by: Markus Himmel <markus@himmel-villmar.de>
@joelriou @TwoFX
Update Mathlib/CategoryTheory/Presentable/Basic.lean
99192d4 
Co-authored-by: Markus Himmel <markus@himmel-villmar.de>
@joelriou @TwoFX
Update Mathlib/CategoryTheory/Presentable/Basic.lean
d79187e 
Co-authored-by: Markus Himmel <markus@himmel-villmar.de>
@joelriou @TwoFX
Update Mathlib/CategoryTheory/Presentable/Basic.lean
9ca93d6 
Co-authored-by: Markus Himmel <markus@himmel-villmar.de>
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fixing the build
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joelriou commented Jan 25, 2025

Thanks!

bors merge

@ghost ghost added the ready-to-merge This PR has been sent to bors. label Jan 25, 2025
mathlib-bors bot pushed a commit that referenced this pull request Jan 25, 2025
@joelriou
feat(CategoryTheory): accessible functors and presentable objects (#1…
45844ca 
…9937)

This PR introduces the notions of accessible functors and of presentable objects. An object `X` in a category is `κ`-presentable (for `κ` a regular cardinal) if the functor `Hom(X, -)` commutes with colimits indexed by `κ`-filtered categories.



Co-authored-by: Joël Riou <37772949+joelriou@users.noreply.github.com>
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joelriou commented Jan 25, 2025

bors cancel

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joelriou commented Jan 25, 2025

bors merge

mathlib-bors bot pushed a commit that referenced this pull request Jan 25, 2025
@joelriou
feat(CategoryTheory): accessible functors and presentable objects (#1…
4b33aed 
…9937)

This PR introduces the notions of accessible functors and of presentable objects. An object `X` in a category is `κ`-presentable (for `κ` a regular cardinal) if the functor `Hom(X, -)` commutes with colimits indexed by `κ`-filtered categories.



Co-authored-by: Joël Riou <37772949+joelriou@users.noreply.github.com>
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mathlib-bors bot commented Jan 25, 2025

Pull request successfully merged into master.

Build succeeded:

@mathlib-bors mathlib-bors bot changed the title feat(CategoryTheory): accessible functors and presentable objects [Merged by Bors] - feat(CategoryTheory): accessible functors and presentable objects Jan 25, 2025
@mathlib-bors mathlib-bors bot closed this Jan 25, 2025
@mathlib-bors mathlib-bors bot deleted the category-theory-accessible branch January 25, 2025 22:06
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