The {cases} environment is provided by the {amsmath} package to typeset cases in math. The {mathtools} package introduces extensions, e.g. the cases* and dcases environments.

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hyperref + subequations warnings

This is a follow up question to How to hide known warnings? Recently I decide to stop ignoring LaTeX warnings :), and start trying to discover what's behind them and how to avoid them in future ...
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How can I remove the extra vertical space above the first equation in a cases environment?

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 ...
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More space between the lines in cases

I'm using the cases environment in one of my formulas. Each case is a fraction so I'm using \displaystyle to let them appear bigger. However, the result looks quite ugly because there is no space ...
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brackets in cases

How can I control the size of brackets so that there will be symmetrical in relation of my equations? My code is: \documentclass{article} \usepackage{xltxtra} \usepackage{xgreek} ...