Linked from
The 29 pages that link to Divergence, each with the reason it gives.
Vector fieldRelated: It detects local sources and sinks in the field.
Poisson's equationRelated: The Laplacian can be expressed as the divergence of a gradient.
LaplacianRelated: Applying divergence to the gradient produces the Laplacian.
MagnetostaticsRelated: Zero magnetic divergence expresses the absence of isolated magnetic charges.
Cauchy momentum equationRelated: Applied to stress, it gives the local resultant of internal forces.
SourceRelated: Positive divergence is the local mathematical signature of a source.