18.1. Bootstrap equations Prove that the most general solution of the bootstrap equation relative to a particle bound state of itself SAA(θ) = SAAθ − iπ

3

 SAAθ + iπ

3



is given by SAA(θ) = f23

(θ)

i fxi (θ) f 2 3

−xi

(θ).

Study the motion of the poles of the function SAA(θ) under the shifts induced by the bootstrap equation.