EDB — 14M

Exercises

1. [14M]Prerequisites:[0T5]↺↻.Let $f:ℝ\to ℝ$ be a bounded function. Let it be shown that there at most countably many points where a discontinuity may be removed (i.e. the points $z$ for which $\underset{x\to z}{lim}f(x)\ne f(z)$, see [ 43 ] ).