Weird Symmetry 1

Pink_panther on 7 Oct 2021
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[x,y]=meshgrid(-16:.01:16);
mesh(x,y,cos(x).*tanh(y).*log10(abs(x))./log10(abs(y)))
colormap lines
ax=axis;
axis([ax(1) ax(2) -1.5 0])
view(20,90)
axis off

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