t = -2:0.2:2;
[x y] = meshgrid(t);
z = x+1i*y;
%%
r = log(z);
mesh(real(r));figure;mesh(imag(r));
%%
r = z.^2;
figure;mesh(real(r));figure;mesh(imag(r));
%%
% huomaa alkioittainen operaatio
r = z-1./z;
figure;mesh(real(r));figure;mesh(imag(r));
