I encounter a problem when simplifying the following equation, can anyone give a hint:)(adsbygoogle = window.adsbygoogle || []).push({});

Let A denote an orthonormal matrix, X be a symmetric matrix.

diag(A) is an operator that creates a diagonal matrix of A.

Then, my problem is how to simplify the equation:

[tex]A^{-1} \cdot diag(A \cdot X \cdot A^{-1}) \cdot A[/tex]

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# Help simplify the matrix equation

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