Hi,
I don't want to create a new thread because my question is related to this one. One of the steps in the proof of this theorem is the following relation:
2\cdot|f(x_{1})-f(x_{2})|\geq|x_{1}-x_{2}|
Let's assume the simplest case n=1, and the function:
f(x)=\frac{1}{3}x
It is 𝐶^{1} and...