Editing Wigner–Seitz cell (section)

===Definition===
The Wigner–Seitz cell around a lattice point is defined as the [[locus (mathematics)|locus]] of points in space that are closer to that lattice point than to any of the other lattice points.<ref name=Ashcroft>{{cite book|author1=Neil W. Ashcroft|authorlink1=Neil Ashcroft|author2=N. David Mermin|authorlink2=N. David Mermin|title=Solid State Physics|page=[https://archive.org/details/solidstatephysic00ashc/page/73 73–75]|isbn=978-0030839931|year=1976|publisher=Holt, Rinehart and Winston |url-access=registration|url=https://archive.org/details/solidstatephysic00ashc/page/73}}</ref>

It can be shown mathematically that a Wigner–Seitz cell is a [[primitive cell]]. This implies that the cell spans the entire [[Bravais lattice|direct space]] without leaving any gaps or holes, a property known as [[tessellation]].