English: Three diagrams illustrating divergence of a vector field. The lefthand diagram has positive divergence since the partial derivatives of the field with respect to the and axes are positive. The center diagram has negative divergence since the partial derivatives are negative. The righthand diagram has zero divergence
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基于如下对象的个人作品: ChampSelonSigneDeDiv.pdf由Biolynk (modified: redone from scratch as .svg using Inkscape, changed right-pointing horizontal vectors into up-and-down vectors for 3rd example, modified or omitted captions)
Example diagrams illustrating the divergence of a vector field; the lefthand has positive divergence, the center has negative divergence, and the righthand has zero divergence