On the usual argument for a derivative not being defined at an endpoint
96856
Derivative at Endpoint
87041
How to determine with certainty that a function has no elementary antiderivative?
43637
Derivative of the sine function when the argument is measured in degrees
95400
Different definitions of exterior derivative
2129
Showing that the derivative operator is not bounded on $L^2 (\mathbb{R})$
59279
Example of function that is differentiable, but the second derivative is not defined
33488
A uniformly continuous function such that the derivative is not bounded and is not defined on a compact?
103241
A function that is continuous at the origin but not differentiable there
131444
Local maximum implies derivative is $0$
45071
Having the derivative be an operator
1246
Differences between derivatives and strong derivatives
156536
Defining functions as derivatives
127114
Differentiability implying continuity
133424
Why do we make a distinction between derivatives and partial derivatives?
48464
If the derivative approaches zero then the limit exists
129765
Mean value theorem for the second derivative, when the first derivative is zero at endpoints
123602
Non integer derivative of $1/p(x)$