deletions | additions       diff --git a/Nonlinear irreversible kinetics.tex b/Nonlinear irreversible kinetics.tex  index 3c5dd2b..7ece816 100644  --- a/Nonlinear irreversible kinetics.tex  +++ b/Nonlinear irreversible kinetics.tex 
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\begin{equation}  k_i(t) \equiv  \begin{cases}  \displaystyle -\frac{d}{dt}\ln S_1(t) & \text{if } i = 1 \\[3pt] \\[10pt]  \displaystyle +\frac{d}{dt}\frac{1}{S_i(t)^{i-1}} & \text{if } i \geq 2.  \end{cases}  \end{equation}