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I would like to write something of the form:

\begin{align}  
c_1 & = 1 \\  
c_2 & = 1 + 2 \\  
c_3 & = 1 + 2 + 3  \\  
& \; \; \vdots  
\end{align}

I would like the first three equations to have "normal" equation numbering, but the last line involving \vdots to be without equation numbering. Is this possible?

1 Answer 1

3

Since you are loading amsmath, you can use \notag (without amsmath there's \nonumber) to suppress the numbering for a given line:

\documentclass{article}
\usepackage{amsmath}

\begin{document} 

\begin{align}
c_1 &= 1 \\
c_2 &= 1 + 2 \\
c_3 &= 1 + 2 + 3 \\
&\;\;\vdots \notag
\end{align}

\end{document}

enter image description here

2
  • Awesome, thanks! I actually use align as well so I edited it (I do not know why I typed aligned).
    – Hunter
    Commented Feb 3, 2014 at 2:23
  • 1
    @Hunter You're welcome! I edited my answer; adding that with amsmath, you can also use \notag. Commented Feb 3, 2014 at 2:28

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