grandes-ecoles 2020 QII.5

grandes-ecoles · France · x-ens-maths-d__mp Not Maths

5. Show that $Y(O_{n-1})$ is open and closed in $U_{n-1}$ and deduce that $Y$ is surjective.

5. Show that $Y(O_{n-1})$ is open and closed in $U_{n-1}$ and deduce that $Y$ is surjective.