Παντα ρει
m a = F
dp/dt = –∇ V
dX/dt = {H,X}
df(v)/dt = ∫ (f(v')f(w')–f(v)f(w)) σ(v,w,v',w') dw dw'
i ∂ψ/∂t = H ψ
i γμ(∂μ + ie Aμ)ψ = m ψ
ρ (∂t + (v∇))v = –∇p + η Δv + (η/3+ζ) ∇(∇v)
(∂t2 – c2 Δ)Φ = 0
∂tB = –∇×E
∂μFμν= 4π jν
Rμν–½R gμν=–(8πγ/c4) Tμν–Λ gμν
3(∂tA/A)2 = –3k c2/A2 + Λ c2+8πγ ε