1

I want to display the following

enter image description here

I'm trying to realize it with the following code

\documentclass{article}
\usepackage{amsmath}
\usepackage{mathtools}

\begin{document}
        \begin{equation}
                    \begin{cases}
             &a + b\\
             & b + c
            \end{cases} \implies
            
            \begin{cases}
            & c + d\\
            & d + e
            \end{cases} 
        \end{equation}
\end{document}

But this gives me a lot of errors and the wrong output enter image description here

Does anyone know how to fix this?

2
4

In addition to getting rid of the blank line between the two cases environments, you should also (a) get rid of the & alignment operators (since you're not really making use of much of the cases machinery) and (b) insert a \quad directive after \implies in order to even out the spacing to the left and right of the \implies (aka \Longrightarrow) symbol.

enter image description here

\documentclass{article}
\usepackage{mathtools} % mathtools loads amsmath automatically
\begin{document}

        \begin{equation}
             \begin{cases}
                a + b\\
                b + c
             \end{cases} 
             \implies \quad
             \begin{cases}
                c + d\\
                d + e
            \end{cases} 
        \end{equation}

\end{document}

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.