In the chart $r^4=2s^4-1$ at infinity of $x^4+y^4=2$, $1/s$ is not in the local ring at $(0,\zeta)$

Initializing...

In the chart $r^4=2s^4-1$ at infinity of $x^4+y^4=2$, $1/s$ is not in the local ring at $(0,\zeta)$ · Prove2Me