[Merged by Bors] - refactor(Data/Matrix/Basic): split row/column decls #8089
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This splits out
row
/col
/updateRow
/updateColumn
to their own file, asData/Matrix/Basic
is getting rather large.The copyright comes from leanprover-community/mathlib#1816 and leanprover-community/mathlib#2480
There are no new lemmas in this PR, nor were any existing lemmas deleted.
It's possible that even more lemmas could migrate to this new file (for instance, flipping the import with
Matrix.Notation
orLinearAlgebra.Matrix.Trace
), but I've taken the conservative option of leaving those lemmas alone for now.