The process in which two or more populations accumulate genetic changes (mutations) through time.
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)
The degree to which two or more things diverge.
An unforeseen obstacle to progress; a hitch or delay.
An emotional difficulty or a psychological inhibition; a complex.