EDB — 2CF

9.15 Circle[2CF]

It is a closed set in \(ℝ^ 2\), so we can think of it as a complete metric space with the Euclidean distance \(d(x,y)=|x-y|_{ℝ^ 2}\).

As usual, given \(t∈ℝ\), we indicate with \([t]\) the class of elements in \(ℝ/2𝜋\) equivalent to \(t\).

Exercises

1. [0Y5]↺↻

2. [0Y7]↺↻

3. [0Y9]↺↻

4. [0YB]↺↻

5. [0YD]↺↻

6. [0YF]↺↻

[ [0YG]↺↻]