Why multi-value of log results in its non-differentiability?
101619
Question involving the Cauchy-Goursat Theorem
55507
Multivariate differentiability verification
100037
nth roots and logarithm
90780
Why does implicit differentiation work on non-functions?
148737
Is $|xy|$ differentiable in $(0,0)$?
120784
Differentiablility over closed intervals
73073
Differentiating $y=x^{2}$
537
Set of branch points isn't discrete, but branch points are isolated?
32917
Show that, for $t>0$, $\log t$ is not a polynomial.
15110
About irrational logarithms
133614
Why is $x^{\log_x n}=n$?
39406
Continuity $\Rightarrow$ Intermediate Value Property. Why is the opposite not true?
19828
Show that $\frac{x^3}{x^2+y^2}$ is not differentiable at $(0,0)$, even though all directional derivatives exist
83915
Showing that a function is not differentiable
13781
Interpolating functions returned by NDSolve do not plot
151226
Why is the sequence $x(n) = \log n$ **not** Cauchy?
69187
What's my confusion with the chain rule? (Differentiating $x^x$)