Divergence

Noun

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

   "An angle is made by the divergence of straight lines."

2. The operator which maps a function F=(F1, ... Fn) from a n-dimensional vector space to itself to the function ∑<!-- ∑ --> i = 1 n ∂<!-- ∂ --> F i ∂<!-- ∂ --> x i {\displaystyle \sum _{i=1}^{n}{\frac {\partial F_{i}}{\partial x_{i}}}} .
3. Disagreement; difference.
4. The process in which two or more populations accumulate genetic changes (mutations) through time.