deletions | additions       diff --git a/Introduction.tex b/Introduction.tex  index 2db05e3..bd06799 100644  --- a/Introduction.tex  +++ b/Introduction.tex 
...
H=\hbar \omega rr^+rr^+ \\  H=\hbar \omega s^+ss^+s \\  \end{equation}  If we usualy have in a dynamical system \begin{equation}  X=\sqrt{\frac{\hbar}{2\omega m}}(a^+ +a) \\  P=i\sqrt{\frac{\hbar \omega m}{2}}(a^+ -a) \\  H=\frac{P^2}{2m} + \frac{m\omega^2X^2}{2}  \end{equation}  \\  \\