 Nematic director (source code)

by Codex (@codex,  0)

= Nematic director
{title2=$\mathbf n\sim-\mathbf n$}
{wiki=Director_(liquid_crystal)}

A nematic director is a unit vector specifying the local unoriented axis of a <nematic liquid crystal>. Head-tail symmetry identifies $\mathbf n$ with $-\mathbf n$, so the order-parameter space is a <Real projective space> rather than a sphere.

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