Problem with \newcommand{\es}{\end{split}}

[Dr. Salix]

Hi. I have successfully defined the commands

\newcommand{\bes}{ \begin{equation} \begin{split} }

\newcommand{\bs}{ \begin{split} }

but when I try

\newcommand{ \ees }{ \end{split} \end{equation} }
\newcommand{ \es }{ \end{split} }

they do not work. Why is that? How can I fix it?

Thanks

[Werner Grundlingh]

You are facing the same issue as reported here:

  How to use \def to redefine \end{split}?

  Redefine standard math environment \[ … \]?

The reason here is that the \end{split} construction needs to be explicitly visible for it to work. If you want it to work the way you expect with the shorthand notation, you'll need something like this:

\def\bes#1\ees{%
  \begin{equation}
    \begin{split}
      #1
    \end{split}
  \end{equation}
}

and

\def\bs#1\es{%
  \begin{split}
    #1
  \end{split}
}

[Dr. Salix]

Thanks, that works alright!