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eqnarray or align?!

http://www.tug.org/TUGboat/tb33-1/tb103madsen.pdf

Whenever the eqnarray environment appears in a question or example of a problem on comp.text. tex, tex.stackexchange.com or other fora there is a high probability that someone will tell the poster not to use eqnarray. This article will provide some examples of why many of us consider eqnarray to be harmful and why it should not be used.

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closed as not a real question by barbara beeton, Stephan Lehmke, percusse, cmhughes, cgnieder Dec 15 '12 at 18:24

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

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What is the question? –  Heiko Oberdiek Dec 15 '12 at 17:24
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Welcome to TeX.sx! The site is Q&A-focussed, unlike a traditional forum, so this is very likely to get closed as 'not a real question'. –  Joseph Wright Dec 15 '12 at 17:26
    
it is not a question. it is for knowledge.... –  Hadi Safi aghdam Dec 15 '12 at 17:41
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@HadiSafiaghdam 'Content' needs to be in the answer section as we are Q&A focussed: you could for example write a suitable question and answer it yourself. Note however there is already \enqarray vs \align. –  Joseph Wright Dec 15 '12 at 17:48
    
@HadiSafiaghdam if it's for your knowledge, then it would be more appropriate to bookmark it –  cmhughes Dec 15 '12 at 18:06
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