β, beta β= v/c (4-32), see small-case "b"
ε0 electric ?[permeability,permittivity]? in a vacuum,
ε0 = 8.854 187 817... 10−12 F/m (farads per metre).
BUT The value of ε0 is currently defined by the formula[2]
ε0 = 1/μ0/c^2 AHHH HAH!
εr relative static permittivity
λ , lamda wavelength (equ?)
λ(v) velocity-dependent proportionality between Ei and E0 (4-31)
μ0 magnetic ?[permeability,permittivity]?.
ε0 = 1/μ0/c^2 or ε0*μ0 = c^2
µ0 = 4π10−7 N / A2 ≈ 1.2566370614...10−6 H / m or Tm / A or Wb / (Am) or Vs / (Am)
φ(r), phi For Appendix A as per p179h0.25 (A-3) (A-3) and (A-8) and p180h0.45 just below (A-10) from Ampere's Law
φ(r) = -3/2/c/|r|^2
But "A" drops out between p179h0.9 (A-9) and p180h0.3 (A-10) , assuming for CGS units that A/2 = 1/c (but Lucas typically uses Gaussian units?)
This is likely because A is "absorbed" into an arbitrary (at that point) ?
Shorthand PP(r)
χ(r), chi χ(r) = i*i/c/|r|^3 from p180h0.5 (A-11)
ψ(r), psi ψ(r) = B/|r|^2 as per p179h0.25 (A-3) from Ampere's Law,
from p179h0.8 (A-8) B = -3/2*A
Ω, omega solid angle (5-16)
θ, theta is the 2D angle between the plane perpendicular to v (unit vector for velocity of a POI - often of the particle in the observer frame), centered at the particle, and another point of interest(POI), measured from the direction of v.
In a sense, the angle θ is like the LATITUDE of the point of interest wrt the particle.
w, ω angular speed (radians/s (Fiigure 7-2,8-1) , w1,w2
ρ charge density
∇' I'm guessing ∇' is Lucas's notation for the time gradient dp[dt: ...]
∇' (4-28) here it is a spatial, NOT time, derivative!?!?