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  • Cross-Section of Umbilic Torus

on 8 Oct 2022
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n=99;
u=(-pi/2:2/n:pi/2)';
v=0:4/n:2*pi;
s=@(x)sin(x);
c=@(x)cos(x);
f=@(x)7*x*ones(size(v))+(c(u/3).*x)*(c(2*v)+2*c(v))+(s(u/3).*x)*(s(2*v)-2*s(v));
x=f(c(u));
y=f(s(u));
z=s(u/3)*(c(2*v)+2*c(v))+c(u/3)*(2*s(v)-s(2*v));
surf(x,y,z,FaceA=0.75,EdgeC='none');
axis image;
set(gca,Vis='off');
view([-70 35]);
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