# nLab lattice in a vector space

This entry is about the notion of lattice in group theory/quadratic form-theory. For other notions see at lattice (disambiguation).

# Contents

## Idea

A lattice in the Cartesian space $\mathbb{R}^n$ is a discrete subgroup (of the underlying topological abelian group) that spans $\mathbb{R}^n$ as a vector space over $\mathbb{R}$.

## References

Revised on July 10, 2014 05:50:44 by Urs Schreiber (185.37.147.13)