EDB — 14M

Exercises

1. [14M]Prerequisites:[0T5]↺↻.Let \(f:ℝ→ℝ\) 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 \(\lim _{x→ z} f(x) ≠ f(z)\), see [ 43 ] ).