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The files `Mathlib.LinearAlgebra.FreeModule.Rank`, `Mathlib.LinearAlgebra.FreeModule.Finite.Rank`, `Mathlib.LinearAlgebra.Dimension` and `Mathlib.LinearAlgebra.Finrank` were reorganized into a folder `Mathlib.LinearAlgebra.Dimension`, containing the following files - `Basic.lean`: Contains the definition of `Module.rank`. - `Finrank.lean`: Contains the definition of `FiniteDimensional.finrank`. - `StrongRankCondition.lean`: Contains results about `rank` and `finrank` over rings satisfying strong rank condition - `Free.lean`: Contains results about `rank` and `finrank` of free modules - `Finite.lean`: Contains conditions or consequences for `rank` to be finite or zero - `Constructions.lean`: Contains the calculation of the `rank` of various constructions. - `DivisionRing.lean`: Contains results about `rank` and `finrank` of spaces over division rings. - `LinearMap.lean`: Contains results about `LinearMap.rank` API changes: `IsNoetherian.rank_lt_aleph0` and `FiniteDimensional.rank_lt_aleph0` are replaced with `rank_lt_aleph0`. `Module.Free.finite_basis` was renamed to `Module.Finite.finite_basis`. `FiniteDimensional.finrank_eq_rank` was renamed to `finrank_eq_rank`. `rank_eq_cardinal_basis` and `rank_eq_cardinal_basis'` were removed in favour of `Basis.mk_eq_mk` and `Basis.mk_eq_mk''`. Co-authored-by: Andrew Yang <36414270+erdOne@users.noreply.github.com>
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