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Possible Duplicate:
Align two inequalities

I'd like to make an {align} with three columns, with an [rcl] type alignment, to typeset something like

a < b < c

a < bb < c

a < bbb < c

and so on, with all less-than symbols vertically aligned. The standard {alignat}{2} in amsmath allows me to fake an [rll] type alignment (first column right justified, second and fourth columns left justified, with an empty third column), but it seems clumsy. I could manage with the old array environment if I did not need to add labels to each line. Is there a package to do three-column alignments directly, compatible with amsmath?

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    amsmath is designed to make typesetting high quality mathematics easy. What you're asking for typically does not look very good and is pretty uncommon.
    – TH.
    Dec 5 '10 at 6:17
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    I agree with @TH. If you want to do it nevertheless, you probably can find an answer in this post. Dec 5 '10 at 9:17
  • @Hendrik: Good point. Voting to close as an exact duplicate. (I note I even gave an answer in the other post...)
    – TH.
    Dec 5 '10 at 9:51
  • @Hendrik: Thanks for the link, my search missed it.
    – jvarilly
    Dec 5 '10 at 16:24
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    @TH: Not an exact duplicate, though, since I need equation labels, too. The best answers to that other post require manual box measurements for each instance; can't one do better, say with judiciously placed \hfil's? (I appreciate your aesthetic judgement, but I still need to solve this conundrum.)
    – jvarilly
    Dec 5 '10 at 16:28