divergence

noun4

1. •
   The state or degree of being divergent: of diverging.

   • An angle is made by the divergence of straight lines.
2. •
   Disagreement; difference.

   • divergence of thought — 1852
3. •
   The process in which two or more populations accumulate genetic changes (mutations) through time.
4. •
   The operator which maps a function F=(F₁, ... Fₙ) from a n-dimensional vector space to itself to the function ∑ᵢ₌₁ⁿ(∂F_i)/(∂x_i).