I was going through an Electrodynamics textbook, and as a prerequisite it requires elemenets of Vector calculus and Multivariable calculus. They discussed divergence, and gave examples of fields with positive and negative divergence. And they also gave a graphic example of a vector field where all the vectors are equal and parallel to each other as a field with 0 divergence.
However, to me it seems that this should have a positive divergence, not 0. Can someone explain this to me?