EDB — 0T5

Exercises

1. [0T5] Prerequisites:[0MF]↺↻. Note:exercise 4 in the written exam of 13/1/2011.

   If $A\subseteq {ℝ}^n$ is composed only of isolated points, then $A$ has countable cardinality.

   Conversely, therefore, if $A\subseteq {ℝ}^n$ is uncountable then the derivative $D(A)$ is not empty.

   Solution 1

   [0T6]↺↻