All Questions
1 question
3
votes
0
answers
123
views
Number of distinct directions in the set $\mathbb{Z}^2 \cap B(0,R)$
We say that non-zero directions $v, w \in \mathbb{R}^2$ are equivalent if they span the same line (i.e. $\exists C \in \mathbb{R}: v = Cw$.), and distinct otherwise. Given a collection $V \subset \...
- 81