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- documentclass[svgnames]{standalone}
- usepackage{pgfplots}
- pgfplotsset{compat=1.8}
- begin{document}
- begin{tikzpicture}
- begin{axis}[
- axis lines=center,
- axis equal,
- domain=0:360,
- y domain=0:1.25,
- y axis line style=stealth-,
- y label style={at={(0.325,0.15)}},
- xmax=1.75,ymax=1.5,zmax=1.5,
- xlabel = $varphi_1$,
- ylabel=$varphi_2$,
- zlabel=$U_k(rho)$,
- ticks=none,
- ]
- addplot3 [surf,shader=flat,draw=black,fill=white,z buffer=sort] ({sin(x)*y}, {cos(x)*y}, {(y^2-1)^2});
- end{axis}
- fill[DarkBlue] (3.05,3.4) circle (0.1) coordinate (center);
- fill[DarkRed] (4.7,2) circle (0.1) coordinate (minimum);
- draw[LightGray,line width=0.8,shorten <=5,shorten >=5] (center) edge[out=-15,in=150,->] (minimum);
- end{tikzpicture}
- end{document}
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