How to negate the definition of continuity using Generalized De Morgan's Law.
124124
Negate epsilon-delta continuity
47199
Can $\le$ be used insted of < in the definition of continuity?
33488
A uniformly continuous function such that the derivative is not bounded and is not defined on a compact?
90745
Why aren’t continuous functions defined the other way around?
12449
How to formulate continuum hypothesis without the axiom of choice?
31272
Why does the continuity correction (say, the normal approximation to the binomial distribution) work?
76607
Show that exists a continuous function in $E$ that is not bounded
82280
Problem about continuous functions and the intermediate value theorem
131992
A problem on continuous functions
125754
Proving or disproving a statement about continuity and limits
39406
Continuity $\Rightarrow$ Intermediate Value Property. Why is the opposite not true?
16291
Discontinuous derivative.
72185
The negation of a limit condition, Spivak style.
157347
continuity, discontinuity derivative and relation to being derivative but its partials are not continuous
44522
Subsets of the reals when the Continuum Hypothesis is assumed false
110258
Continuous but not uniformly continuous example
103241
A function that is continuous at the origin but not differentiable there