Multiple Reactivity Calculation

Let us now consider multiple $\Delta$Ks (${\Delta}K_i$, i = 1,2,3,...,N) due to multiple small perturbations of the same unperturbed system [Maj95a], where the N perturbed systems are denoted by p_i, i = 1,2,3,...,N :

$${\Delta}K_i = K^{p_i} - K^{up}\;\;\;; i=1,2,3,...,N.$$ (88)