Is the following inside of outside the Nyquist curve?

Question

Consider the following Nyquist plot,

Is the green dot outside it or inside it? To me this would be outside the interior of the plot. Is this correct?

Answer 1

The green dot lies inside the Nyquist plot. In fact, the green dot is encircled twice in the clockwise direction. If you are going to perfrom stability analysis, be sure to note if you made a plot of $$1+G(s)H(s)$$ or $$G(s)H(s)$$ where $\left[1+G(s)H(s)\right]$ is the system characteristic equation.