EDB — 0WR

Exercises

1. [0WR] Consider two balls $B(x,r)$ and $B(y,𝜌)$ radius $0<r\le 𝜌$ that have non-empty intersection: then $B(x,r)\subseteq B(y,𝜌)$.

   Similarly for the disks $D(x,r)\stackrel{.}{=}\{y\in X:d(x,y)\le r\}$ and $D(y,r)$.

   Solution 1

   [0WS]↺↻