Talk:Weibel instability

"A" is undefined

In the introduction, the sentence "The Lorentz force then bends the electron trajectories with the result that upward-moving-ev x B electrons congregate at B and downward-moving ones at A." refers to undefined quantity A. Is it some vector potential or some amplitude of the electric field, as defined in equations below ? It is confusing.

--Tjyderrien (talk) 08:15, 14 June 2020 (UTC)