θ1−θ=1G(θ2−θ1)\theta_{1}-\theta=\frac{1}{G}\left(\theta_{2}-\theta_{1}\right)θ1−θ=G1(θ2−θ1)
θ1−θ=G(θ2−θ1)\theta_{1}-\theta=\mathrm{G}\left(\theta_{2}-\theta_{1}\right)θ1−θ=G(θ2−θ1)
θ1−θ=(θ1−θ2)G\theta_{1}-\theta=\left(\theta_{1}-\theta_{2}\right) Gθ1−θ=(θ1−θ2)G
θ1−θ2=(θ2−θ)G\theta_{1}-\theta_{2}=\left(\theta_{2}-\theta\right) \mathrm{G}θ1−θ2=(θ2−θ)G