$d/dx$ is not continuous in $L^2$
2129
Showing that the derivative operator is not bounded on $L^2 (\mathbb{R})$
57839
Real analysis: density and continuity
33488
A uniformly continuous function such that the derivative is not bounded and is not defined on a compact?
135449
Prove: $\frac1x$ is not a uniformly continuous function
88240
Two functions discontinuous, but sum continuous
77464
Prove that ${x dy - y d x\over x^2 + y^2}$ is not exact
148302
In convergence, why not $d \leq \epsilon$?
83494
Uniform continuity of $\ln(x)$
143708
$L^1$ and $L^{\infty}$ are not reflexive
117419
Why is $e^{x}$ not uniformly continuous on $\mathbb{R}$?
110526
Why is $l^\infty$ not separable?
83907
$f$ bounded but $f'$ isn't
157347
continuity, discontinuity derivative and relation to being derivative but its partials are not continuous
158567
A uniform continuous function which is not Hölder continuous
30036
Function in $H^1$, but not continuous
74145
How to prove $x^{n}$ is not uniformly continuous
32205
Topology on the real numbers such that all polynomials are continuous but cosine is not continuous