Does the n'th derivative of a smooth transition have to have more than n+1 roots for some n?
67291
Prove that there exists $n\in\mathbb{N}$ such that $f^{(n)}$ has at least n+1 zeros on $(-1,1)$
128795
$n$th derivative of $e^x \sin x$
59911
Looking for help with a proof that n-th derivative of $e^\frac{-1}{x^2} = 0$ for $x=0$.
153406
$[F(t):F(t^n)]=n$ where $t$ is trascendental
157347
continuity, discontinuity derivative and relation to being derivative but its partials are not continuous
16291
Discontinuous derivative.
60897
Non-integer order derivative
46504
Does there exist a smooth approximation of $x \bmod y$?
24449
How discontinuous can a derivative be?
973
Is the property "being a derivative" preserved under multiplication and composition?
66639
Second Derivative
117338
Counterexample to second derivative test when f''(x) is not continuously differentiable
90892
Is a function increasing if the derivative is positive except at one point of an interval?
47688
Number of roots of differentiable function
28096
Finding the derivative of $x\uparrow\uparrow n$
115635
Differentiability of antiderivative and continuity of derivative
142538
The number of solutions to an $n^{th}$ order differential equation.