LaTeX alligned numbered equations

Question

I am trying to align two vector definitions next to each other. Both equations are (and should be) numbered. I found a similar (answered) question on Stack but my equations doesn't seem to align properly.

This is my code

\begin{multicols}{2}
\begin{equation}
\label{eq:va}
\begin{aligned}
\textbf{v}_a =  \begin{pmatrix} 
    {\alpha_1} \\ {\alpha_2} \\ {\vdots} \\ {\alpha_{T-1}} \\ {\alpha_T} \end{pmatrix}
\end{aligned} 
\end{equation}\break

\begin{equation}
\label{eq:vc}
    \begin{aligned}
        \textbf{v}_c =  \begin{pmatrix} 
        {\beta_1} \\ {\beta_2} \\ {\vdots} \\ {\beta_{T-1}} \\ {\beta_T} \end{pmatrix}
    \end{aligned} 
\end{equation}
\end{multicols}

Never mind, I found the problem. I'll add the answer. – J.O.P.P. May 20 '20 at 13:05 — J.O.P.P., May 20 '20 at 13:05

score 3 · Answer 1 · answered May 20 '20 at 13:11

With the help of two minipages:

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

\noindent
\begin{minipage}{0.5\textwidth}
  \begin{equation}
    \label{eq:va}
    \begin{aligned}
      \textbf{v}_a =  \begin{pmatrix} 
      {\alpha_1} \\ {\alpha_2} \\ {\vdots} \\ {\alpha_{T-1}} \\ {\alpha_T} \end{pmatrix}
    \end{aligned} 
  \end{equation}
\end{minipage}%
\begin{minipage}{0.5\textwidth}
  \begin{equation}
  \label{eq:vc}
    \begin{aligned}
        \textbf{v}_c =  \begin{pmatrix} 
        {\beta_1} \\ {\beta_2} \\ {\vdots} \\ {\beta_{T-1}} \\ {\beta_T} \end{pmatrix}
    \end{aligned} 
  \end{equation}
\end{minipage}

\end{document}

score 1 · Answer 2 · answered May 20 '20 at 13:11

Some further web-search gave me the answer.

1 ) Remove \break 2 ) Add \noindent before the first equation

Correct code:

\begin{multicols}{2}
\noindent
\begin{equation}
\label{eq:va}
\begin{aligned}
\textbf{v}_a =  \begin{pmatrix} 
    {\alpha_1} \\ {\alpha_2} \\ {\vdots} \\ {\alpha_{T-1}} \\ {\alpha_T} \end{pmatrix}
\end{aligned} 
\end{equation}
\begin{equation}
\label{eq:vc}
    \begin{aligned}
        \textbf{v}_c =  \begin{pmatrix} 
        {\beta_1} \\ {\beta_2} \\ {\vdots} \\ {\beta_{T-1}} \\ {\beta_T} \end{pmatrix}
    \end{aligned} 
\end{equation}
\end{multicols}

LaTeX alligned numbered equations

2 Answers2