# Table of displayed formulae

I'm trying to make a table of formulae. I've tried a bunch of different approaches (including \parbox, align, eqnarray, etc.), but none of these satisfy all of the requirements:

• \hline (or something equivalent) can still be used.
• Vertical lines can be put between columns
• Every cell can contain a formula in \displaystyle
• Formulae are centered both horizontally and vertically.

Does anybody know an environment that does this?

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@adn: didn't have one; only examples that meet part of the criteria –  Martijn Dec 14 '11 at 12:59

Perhaps the array packages offers a partial solution:
\documentclass{article}