0
$\begingroup$

Given $G=\left\{A\in M_2(\mathbb{R})\mid A^\top XA = X\right\}$.

Need to find the basis. Error in question

  • 2
    Treat $Y^TX+XY=0$ as a system of homogeneous equations in the unknown four entries $y_{ij}$ of the matrix $Y$. Use linear algebra techniques to find a basis for the solution space. I got a different basis (but a 1-dimensional space anyway).2011-12-31

1 Answers 1