Is my definition of discontinuity correct?
72185
The negation of a limit condition, Spivak style.
76351
Equivalence of continuity definitions
12107
How is the epsilon-delta definition of continuity equivalent to the following statement?
124444
If $f$ s discontinuous at $x_0$ but $g$ is continuous there, then $f+g$?
116484
Plot is discontinuous (it shouldn't be)
52486
Is there a function that is contiunous at all the rationals, and discontinuous at all the irrationals?
18511
Can we construct a function that has uncountable many jump discontinuities?
140445
Sequence of continuous functions whose pointwise limit is discontinuous
134752
Proof (epsilon delta) for the continuity of a function at a point
85396
Plotting discontinuous functions without spurious vertical segments
79340
Dirichlet problem in the disk: behavior of conjugate function, and the effect of discontinuities
17452
Is differentiating on both sides of an equation allowed?
155618
Slightly changing the formal definition of continuity of $f: \mathbb{R} \to \mathbb{R}$?
54304
How to make sense out of the $\epsilon-\delta$ definition of a limit?
150833
Discontinuities of the derivative of a differentiable function on closed interval
20688
Discontinuous functions with closed graphs
112404
Eliminating discontinuities for increasing function