Conormal
= Conormal
{title2=$\boldsymbol\nu$}
Along the <boundary> of an <oriented surface>, the outward unit <conormal> lies in the <tangent plane> of the <surface> and is perpendicular to the <boundary> <unit tangent vector>. If $\mathbf n$ is the chosen <unit normal vector>, the positively oriented <unit tangent vector> is $\mathbf n\times\boldsymbol\nu$.