137 | | \[\sigma^2(N') = \sum_m\left(\frac{dN'}{dE_m}\sigma(E_m)\right)^2+\sum_n\left(\frac{dN'}{d\theta_n}\sigma(\theta_n)\right)^2\] |
138 | | |
139 | | \[= \sum_m\left(\frac{d\rho(E_m)}{dE_m}\sigma(E_m)\sum_j\tau(\theta_j)\right)^2+\sum_n\left(\frac{d\tau(\theta_n)}{d\theta_n}\sigma(\theta_n)\sum_i\rho(E_i)\right)^2\] |
140 | | |
141 | | \[= \left(\sum_j\tau(\theta_j)\right)^2\sum_m\left(\frac{d\rho(E_m)}{dE_m}\sigma(E_m)\right)^2+\left(\sum_i\rho(E_i)\right)^2\sum_n\left(\frac{d\tau(\theta_n)}{d\theta_n}\sigma(\theta_n)\right)^2\] |
| 137 | \[\sigma^2(N') = \sum_m\left(\frac{dN'}{d\rho_m}\sigma(\rho_m)\right)^2+\sum_n\left(\frac{dN'}{d\tau_n}\sigma(\tau_n)\right)^2\] |
| 138 | |
| 139 | \[= \sum_m\left(\sum_j\tau(\theta_j)\sigma(\rho_m)\right)^2+\sum_n\left(\sum_i\rho(E_i)\sigma(\theta_n))^2\] |