Lattice (group) - Dividing Space According To A Lattice

Dividing Space According To A Lattice

A typical lattice Λ in thus has the form

$\Lambda = \left.\left\{ \sum_{i=1}^n a_i v_i \; \right\vert \; a_i \in\Bbb{Z} \right\}$

where {v₁, ..., v_n} is a basis for . Different bases can generate the same lattice, but the absolute value of the determinant of the vectors v_i is uniquely determined by Λ, and is denoted by d(Λ). If one thinks of a lattice as dividing the whole of into equal polyhedra (copies of an n-dimensional parallelepiped, known as the fundamental region of the lattice), then d(Λ) is equal to the n-dimensional volume of this polyhedron. This is why d(Λ) is sometimes called the covolume of the lattice.

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