Heisenberg's uncertainty principle states that: if the x-component of the momentum of a particle is measured with an uncertainty
$$\Delta \vec p_x$$
then its x-position cannot, at same time, be measured more accurately than
$$\Delta\vec x=\frac {\hbar}{2\Delta\vec p_x},$$
$$\Delta\vec x\Delta\vec p_x \ge \frac {\hbar}{2}.$$$$\sigma(x)\sigma( p_x )\ge \frac {\hbar}{2}.$$
What is the scientific proof of this principle?
Operators Uncertainty