Use \emph when introducing notation (that doesn't seem to deserve \fi…

…rstuse)

chapters/synchronous.tex

@@ -278,7 +278,7 @@ \subsection{Argument Restrictions (Component Expression)}\label{argument-restric
 \end{nonnormative}
 \end{definition}
 
-In the following sections, when defining an operator with function calling syntax, there are some common restrictions being used for the input arguments (operands).  For example, an input argument to the operator may be required to be a component expression (\cref{def:component-expression}) or parameter expression (\cref{variability-of-expressions}).  To emphasize that there are no such restrictions, an input argument may be said to be just an expression.
+In the following sections, when defining an operator with function calling syntax, there are some common restrictions being used for the input arguments (operands).  For example, an input argument to the operator may be required to be a component expression (\cref{def:component-expression}) or parameter expression (\cref{variability-of-expressions}).  To emphasize that there are no such restrictions, an input argument may be said to be just an \emph{expression}.
 
 \begin{nonnormative}
 The reason for restricting an input argument to be a component expression is that the start value of the input argument is returned before the first tick of the clock of the input argument and this