Trace and norm integrality criterion for a quadratic extension
= Trace and norm integrality criterion for a quadratic extension
In a quadratic extension $L/K$, an element is integral exactly when its relative trace and norm lie in $\mathcal O_K$.
= Trace and norm integrality criterion for a quadratic extension
In a quadratic extension $L/K$, an element is integral exactly when its relative trace and norm lie in $\mathcal O_K$.