{"type":"rich","version":"1.0","title":"Van der Pol oscillator","html":"<span class=\"wb-embed wb-embed-math\" data-latex=\"\\ddot{x}-\\mu\\,(1-x^{2})\\,\\dot{x}+x=0,\\qquad \\mu>0\">\\ddot{x}-\\mu\\,(1-x^{2})\\,\\dot{x}+x=0,\\qquad \\mu&gt;0</span>","width":640,"height":320}