[Tex/LaTex] Having two braces which refer to a set of equations and its initial conditions on the same line

equationspositioning

Say I have;

\usepackage{amsmath}
  \begin{equation}
    \begin{cases}
     \dot x = 2z + xy \\
     \dot y  = 4xy - z\\
     \dot z = -5z
    \end{cases}
  \end{equation}

  \begin{equation}
    \begin{cases}
     x(0) = 0 \\
     y(0)  = 0\\
     z(0) = 1
    \end{cases}
  \end{equation}

How would I write this so that both equations are on the same line?

Best Answer

Just set the two cases in the same equation environment, separating them using something like \quad:

enter image description here

\documentclass{article}
\usepackage{amsmath}
\begin{document}

\begin{equation}
  \begin{cases}
    \dot{x} = 2z + xy \\
    \dot{y} = 4xy - z \\
    \dot{z} = -5z
  \end{cases}
  \qquad
  \begin{cases}
    x(0) = 0 \\
    y(0) = 0 \\
    z(0) = 1
  \end{cases}
\end{equation}

\end{document}

Remember to not leave a blank line in equation.

Related Solutions

[Tex/LaTex] Writing partial differential equation like u_t=u_xx

Are you maybe looking for the following?

enter image description here

\documentclass{article}
\usepackage{amsmath}  % for \text macro
\usepackage{amssymb}  % for \mathbb macro
\begin{document}
\begin{equation}
\{ u_t(x,t)=u_{xx}(x,t)\}, \text{ where $\epsilon\in\mathbb{R}$ and $t>0$}
\end{equation}
\end{document}

Alternatively, might you be looking for the following?

enter image description here

\documentclass{article}
\usepackage{amsmath}  % for \text macro
\usepackage{amssymb}  % for \mathbb macro
\begin{document}
\begin{equation}
u_t(x,t)=u_{xx}(x,t), \text{ where $x\in\mathbb{R}$ and $t>0$}
\end{equation}
\end{document}

[Tex/LaTex] Two labels on the same equation line

Maybe you looking for something like this:

\documentclass{article}
\usepackage{amsmath}

\usepackage[a4paper,showframe]{geometry}

\begin{document}
We have:

    \noindent\begin{minipage}{0.4\textwidth}
\begin{equation}
a = b \label{eqab}
\end{equation} 
    \end{minipage}%
    \begin{minipage}{0.2\textwidth}\centering
    and 
    \end{minipage}%
    \begin{minipage}{0.4\textwidth}
\begin{equation}
c = d \label{eqcd}
\end{equation}
    \end{minipage}\vskip1em

Equations \ref{eqab} and \ref{eqcd} are nice. The same is valid for the next two:

\begin{subequations}\label{eq:3}
    \noindent\begin{minipage}{0.4\textwidth}
\begin{equation}
a = b \label{eq:3a}
\end{equation}
    \end{minipage}%
    \begin{minipage}{0.2\textwidth}\centering
    and
    \end{minipage}%
    \begin{minipage}{0.4\textwidth}
\begin{equation}
c = d \label{eq:3b}
\end{equation}
    \end{minipage}\vskip1em
\end{subequations}

which are  \ref{eq:3a} and \ref{eq:3b}.
    \end{document}

Best Answer

Related Solutions

[Tex/LaTex] Writing partial differential equation like u_t=u_xx

[Tex/LaTex] Two labels on the same equation line

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