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[Merged by Bors] - feat(LinearAlgebra/AffineSpace/FiniteDimensional): finiteDimensional_direction_map#32016

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[Merged by Bors] - feat(LinearAlgebra/AffineSpace/FiniteDimensional): finiteDimensional_direction_map#32016
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@jsm28 jsm28 commented Nov 23, 2025

Add an instance that affine maps send finite-dimensional subspaces to finite-dimensional subspaces.


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…_direction_map`

Add an instance that affine maps send finite-dimensional subspaces to
finite-dimensional subspaces.
@jsm28 jsm28 added easy < 20s of review time. See the lifecycle page for guidelines. t-algebra Algebra (groups, rings, fields, etc) labels Nov 23, 2025
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PR summary f7702fa2d1

Import changes for modified files

No significant changes to the import graph

Import changes for all files
Files Import difference

Declarations diff

+ finiteDimensional_direction_map

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).

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@Ruben-VandeVelde Ruben-VandeVelde left a comment

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maintainer merge

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🚀 Pull request has been placed on the maintainer queue by Ruben-VandeVelde.

@ghost ghost added the maintainer-merge A reviewer has approved the changed; awaiting maintainer approval. label Nov 24, 2025
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@jcommelin jcommelin left a comment

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Thanks 🎉

bors merge

@ghost ghost added ready-to-merge This PR has been sent to bors. and removed maintainer-merge A reviewer has approved the changed; awaiting maintainer approval. labels Nov 24, 2025
mathlib-bors bot pushed a commit that referenced this pull request Nov 24, 2025
…_direction_map` (#32016)

Add an instance that affine maps send finite-dimensional subspaces to finite-dimensional subspaces.
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mathlib-bors bot commented Nov 24, 2025

Pull request successfully merged into master.

Build succeeded:

@mathlib-bors mathlib-bors bot changed the title feat(LinearAlgebra/AffineSpace/FiniteDimensional): finiteDimensional_direction_map [Merged by Bors] - feat(LinearAlgebra/AffineSpace/FiniteDimensional): finiteDimensional_direction_map Nov 24, 2025
@mathlib-bors mathlib-bors bot closed this Nov 24, 2025
@jsm28 jsm28 deleted the finiteDimensional_direction_map branch November 24, 2025 16:33
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3 participants