English
The equivalence ignores the algebra structure, giving a pure tensor-matrix level isomorphism.
Русский
Эквивалентность игнорирует алгебраическую структуру, оставляя чисто тензорно-матричное изоморфизм.
LaTeX
$$$ matrixEquivTensor : A \otimes_R Matrix \_{} \to Matrix \_{} A $ (as pure tensor to matrix isomorphism) $$
Lean4
/-- (Implementation detail)
The equivalence, ignoring the algebra structure, `(A ⊗[R] Matrix n n R) ≃ Matrix n n A`.
-/
def equiv : A ⊗[R] Matrix n n R ≃ Matrix n n A
where
toFun := toFunAlgHom n R A
invFun := invFun n R A
left_inv := left_inv n R A
right_inv := right_inv n R A