4 ms·
The definition you link states that a function has a discontinuity at a point /in its domain/ if yadda yadda. 0 is not in the domain of f'. See for example: htt
by disconcision 8y ago
The definition you link states that a function has a discontinuity at a point /in its domain/ if yadda yadda. 0 is not in the domain of f'. See for example: https://math.stackexchange.com/questions/1431796/if-a-function-is-undefined-at-a-point-is-it-also-discontinuous-at-that-point https://math.stackexchange.com/questions/1431796/if-a-functi...
- thaumasiotes 8y agoThat is a question of your personal focus. For example, I'd expect a theorem that applied to "functions from ℝ to ℝ" to apply to f(x) = 1/x unless a specific qualifier was given.