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This problem seems to be related to the AIAA class that I have to use to submit the paper that I am writing, as I cannot reproduce it with other classes.

The latest Aiaa.cls class file can be retrieved from here (link found at this page).

MWE:

\documentclass{AIAA}
\ProcessOptions

\usepackage{amsmath}

\begin{document}
\begin{equation}
\boldsymbol{S}\left( u \right) = 
\begin{cases}
x\left( u \right) = a_{x} \cdot u\\
y\left( u \right) = a_{y} \cdot u\\
z\left( u \right) = a_{z} \cdot u
\end{cases}
\end{equation}
\end{document}

Visualization of the problem:

enter image description here

How can I get rid of that extra white space/ extra long upper curly brace?

  • I don't have this problem with your code, which I had to modify: the class is aiaa-tc. There must be something else in your real code. – Bernard Apr 21 '16 at 10:15
  • I also did not get this problem. I compiled with aiaa.cls V2.4 (22 FEB 1999) and had to download dropping.sty (V0.12, JUN 12 1997). – Steven B. Segletes Apr 21 '16 at 10:21
  • @Bernard I compiled the code posted and the result is in the image. how did you came to the aiaa-tc class? – Federico Apr 21 '16 at 10:21
  • With AIAA I have an error message: cls unknown. So I read the documentation. How comes you can compile? – Bernard Apr 21 '16 at 10:24
  • @Bernard I have dowloaded the aiaa.cls file – Federico Apr 21 '16 at 10:24

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