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Linear mapping/Finite dimensional/Change of basis/Fact

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Let denote a field, and let and denote finite-dimensional -vector spaces. Let and be bases of and and bases of . Let

denote a linear mapping, which is described by the matrix with respect to the bases and .

Then is described with respect to the bases

and by the matrix

where and are the transformation matrices, which describe the change of basis from to and from

to .