deletions | additions       diff --git a/untitled.tex b/untitled.tex  index 29c0cf5..bfa5a59 100644  --- a/untitled.tex  +++ b/untitled.tex 
...
\begin{subequations}  \begin{align*}  E &= \Set{x}{x \text{ is an acting entity (person)}}\\  \text{Let } & q(a, b) \text{be \text{ be  an action } a \text{ is applying to } b\\ y &= You \in E\\  O &= Others = \Set{x \in E}{x \neq y}\\  o &\in O\\