LECTURE NOTES IN ANALYSIS (2011)
《LECTURE NOTES IN ANALYSIS (2011)》 · 第 312 页 · Section 6.4「The Geometry of Numbers」
In this section we consider sets $\mathcal S$ that lie in real $n$-dimensional space $\mathbb R^n$ and find conditions which ensure that $\mathcal S$ contains a point whose coordinates are integers.