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on 14 Oct 2021
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n = 400;
x=linspace(-2,2,n);
y=linspace(-2,2,n);
[X,Y]=meshgrid(x,y);
z = X + 1i*Y;
% Change the function and see what you get!
w = (z.^2 - 1).*(z + 2-1i).^2 ./ (z.^2 + 2-2i);
imagesc(x,y,angle(w))
colormap(turbo)
shading flat
axis square xy

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