made this image using OpenOffice Draw. It illustrates a null-homotopic contour inside a set that is not simply connected.Frank 1729 (talk) 17:30, 13 December
DescriptionPictorial representation of the Cauchy inequality.png English: A modular surface (blue) with contour replaced by its maximum value (green). The
plot the 0 contours of the real and imaginary parts. That is, compute z = Dm(...) on a reasonably dense grid, and then use matplotlib's contour function