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on 5 Oct 2021
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niter=325;
x0=0.360115;
y0=-0.947915;
x1=0.360135;
y1=-0.947895;
n=1000;
[x,y]=meshgrid(linspace(x0, x1, n),linspace(y0, y1, n));
c=x+1i*y;
z=(0.3+1i*0.2)*ones(size(c));
k=zeros(size(c));
for i = 1:niter
z=z.^4+c;
k(abs(z)>2 & k==0)=niter-i;
end
imshow(k)
colormap(cool)

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