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revBot (Created page with "<div class="d-none"><math> \newcommand{\mathds}{\mathbb}</math></div>Diagonalize explicitely the third flat matrix, namely <math display="block"> \mathbb I_3 =\begin{pmatrix}1&1&1\\1&1&1\\1&1&1\end{pmatrix} </math> and then study as well the general case, that of the matrix <math>\mathbb I_N</math>.")Apr 20'25 at 1:29+301