We propose to study the matrix equation $R^2 = J_3$. Let $R$ be a solution of this equation. Give the values of $R^4$ and $R^6$, then the set of solutions of the equation.
We propose to study the matrix equation $R^2 = J_3$.
Let $R$ be a solution of this equation. Give the values of $R^4$ and $R^6$, then the set of solutions of the equation.