Show the given function is not continuous
97369
Does the limit of $e^{-1/z^4}$ as $z\to 0$ exist?
18222
Set of continuity points of a real function
151573
Show f is continuous on (0, ∞) iff f is continuous at 1 for a defined function.
110112
Proving a function is Lipschitz continuous
44574
Continuity of absolute value of a function
158567
A uniform continuous function which is not Hölder continuous
62817
Functions which are Continuous, but not Bicontinuous
32571
Is the maximum function of a continuous function continuous?
60700
Continuity of a function to the integers
3518
Proving $f(x)=1/x$ on $(0,1 )$ is not uniformly continuous
38417
How to find the non-differentiable point(s) of a given continuous function?
46834
show that a distance function is continuous
74950
Show a function for which $f(x + y) = f(x) + f(y) $ is continuous at zero if and only if it is continuous on $\mathbb R$
135199
Looking for a function $f$ that is $n$-differentiable, but $f^{(n)}$ is not continuous
135449
Prove: $\frac1x$ is not a uniformly continuous function
30036
Function in $H^1$, but not continuous
83338
Show that there's no continuous function that takes each of its values $f(x)$ exactly twice.